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  • PHP 5.4.9 Mysqli issue

    - by Vitaly
    On Ubuntu 12.04 server I had PHP 5.4.9 installed from the source: ./configure --prefix=/etc/php --with-apxs2=/etc/apache2/bin/apxs --with-config-file-path=/etc/php --with-config-file-scan-dir=/etc/php/conf.d --with-libxml-dir=/usr/local/libxml2 --with-xsl=/usr/local/libxslt --with-mysql --with-zlib --with-pdo-mysql --enable-calendar --with-gd --with-iconv-dir --enable-mbstring --enable-soap --enable-sockets --enable-zip --with-curl --with-openssl --with-kerberos --with-tidy' Then, using apt-get, I had mysql server and phpMyAdmin installed. Unfortunatelly phpMyAdmin keep saying that 'mysqli' and 'mcrypt' not installed. php -m | grep mysqli just confirms it. So I tried to install mysqli with "apt-get install php5-mysqli", but just got message to do it by means of "php5-mysqlnd" or "php5-mysql". Even though they are already installed (according to phpinfo()) I tried - doesn't work. However, in php.ini, there's mysqli staff like "extension=php_mysqli.dll", but no "extension=mysqli.so". And block [MySQLi] with some uncommented settings also present. Since this is my first attempt to build php from source I reckon I did some silly mistake. Any help is greatly appreciated.

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  • How do you get AWS VPC EC2 instances to be able to see the AWS APIs?

    - by Peter Mounce
    We're spinning up infrastructure inside of an AWS VPC via CloudFormation. We're using auto-scaling groups to bring up VPC-EC2 instances (so, we don't bring up instances directly; ASGs manage that). Inside of a PVC, EC2 instances only have a private IP; they cannot see the outside world without further work. When these instances spin up, we have some bootstrap tasks that require talking to the various AWS APIs. We also have some ongoing tasks that require AWS API traffic. How are you tackling this apparent chicken-egg problem? We've read about: NAT instances - but don't like this so much because it's another layer to our stack. assigning elastic-IPs to each VPC instance that needs to talk - but a) they all do, and b) since we're using ASGs, we don't know which instances to assign EIPs to at provision-time, and c) we'd need to set up something to monitor those ASGs and assign EIPs when instances are terminated and replaced spinning up an instance (actually, a load-balanced pair, probably spanning AZs) to act as an AWS-API proxy for all API traffic I guess I'm wondering whether there's some kind of back-door we can open that allows our VPC EC2 instances access to the AWS API endpoints, but nothing else, for cheap-complexity setup, that doesn't add another network-hop layer to our infrastructure for serving requests.

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  • How to send email from home ip when the email server isn't a designated outbound mail server allocated to BT Retail customers [on hold]

    - by Mr Shoubs
    (I am sys admin!) I can receive email, but when I try to send an email from my home office via our work email server I get the following reply: Your message did not reach some or all of the intended recipients. Subject: Test Sent: 19/08/2014 17:02 The following recipient(s) cannot be reached: 'Joe Blogs' on 19/08/2014 17:02 Server error: '554 5.7.1 Service unavailable; Client host [my-ip-here] blocked using zen.spamhaus.org; http://www.spamhaus.org/query/bl?ip=my-ip-here' I went to that URL and it says the following: Ref: PBL231588 81.152.0.0/13 is listed on the Policy Block List (PBL) Outbound Email Policy of BT Retail for this IP range: It is the policy of BT Retail that unauthenticated email sent from this IP address should be sent out only via the designated outbound mail server allocated to BT Retail customers. Please consult the following URL for details on how to configure your email client appropriately. http://btybb.custhelp.com/cgi-bin/btybb.cfg/php/enduser/cci/bty_adp.php?p_sid=fPnV4zhj&p_faqid=6876 Removal Procedure Removal of IP addresses within this range from the PBL is not allowed by the netblock owner's policy. Going to this URL just says: This site has been disabled for the time being. Does anyone know what I should do to allow me to send emails from my home ip - the site suggests I can configure my email client? (note that I have configured the client to use smtp authentication)

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  • Setting up port forwarding for web server

    - by reyjavikvi
    This could belong on Super User, but I thought this place was more appropiate. I want to run Apache in my computer and want to make it available to the outside world to test a couple things. Apparently, I have to go into my router's (a TP-LINK TD 8910G) settings and forward port 80 to my PC's IP. So far so good. Thing is, since the router uses a web based interface and it's kind of stupid, it told me that since I was using port 80 for this, I should access its settings through port 8080. Maybe it can't detect requests coming from the LAN, I don't know. Point is, now neither port can't access the configuration, and I can't access Internet. Specifically, trying to access anything (including 192.168.1.1, the router's settings) through port 80 turns up a blank page (maybe if I had the server running in my computer I'd get something, but I don't want to risk trying, I had to reset the router and restore the settings), and port 8080 gives a "Can't establish connection" error in Firefox (and similar ones in other browsers). Is there a way to configure the router to not redirect requests coming from inside the network? I'm a beginner with this stuff, so please try to explain in a simple way. If this is more appropiate in Super User, I'm sorry.

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  • Home Server: storage virtualisation, what to choose?

    - by Huygens
    I'm looking for virtualisation solutions for storage and OS for a home server. A sort of private cloud where I manage the storage space independently of the VM one. This question focus on storage management. (I have another question related to the VM/compute instance management). Here my environement and wishes. Server: HP Proliant MicroServer with 8 GB RAM (AMD Turion dual core with AMD-V technology) with 1 250GB system disk and up to 4 HDD (2 TB) for "data" OS types: only Linux (perhaps a *BSD VM in the future) Linux distributions do not matter, I'm familiar with RHEL, Fedora, Suse, Ubuntu, but any other recommandation will be fine The 4 HDD is going to be a software RAID array, probably RAID 5. storage should be "virtualised/cloudified": easy to extend: if I add a NAS on the network, I can include the NAS space capacity within this storage space as one virtual disk. This can be a NAS, an external HDD or another server. cluster FS or S3 style space or OpenStack block storage? Whatever is easier to manage/maintain and easy to integrate/plug to VM/compute instance. I would prefer free (libre, as in a free speach) and open source tools. But it does not have to be free as in a free beer. Note: the VMs I intend to run on top of this server are one dedicated to backup, one for a "owncloud/dropbox"-like service and perhaps one for media server (hosting video and photos). I'm not sure if traditional VMs or compute instance are the most suitable for this.

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  • nginx with ssl: I get a 403 and log "directory index of '...dir...' is forbidden" log message. works fine with unencrypted connection

    - by user72464
    As mentioned in the title, I had nginx working fine with my rails app, until I tried to add the ssl server. The unencrypted connection still works but the ssl always returns me a 403 page with the following line in the error log: directory index of "/home/user/rails/" is forbidden, client: [my ip], server: _, request: "GET / HTTP/1.1", host: "[server ip]" Below my nginx.conf server block: server { listen 80; listen 443 ssl; ssl_certificate /etc/ssl/server.crt; ssl_certificate_key /etc/ssl/server.key; client_max_body_size 4G; keepalive_timeout 5; root /home/user/rails; try_files $uri/index.html $uri.html $uri @app; location @app { proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Forwarded-Proto $scheme; proxy_set_header Host $http_host; proxy_redirect off; proxy_pass http://0.0.0.0:8080; } error_page 500 502 503 504 /500.html; location = /500.html { root /home/user/rails; } } the /home/user/rails directory and it's parent have all read to all rights. and they belong to the user nginx. the certificate and key file have the following rights: -rw-r--r-- 1 nginx root 830 Nov 8 09:09 server.crt -rw--w---- 1 nginx root 887 Nov 8 09:09 server.key any clue?

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  • PHP Causing Segmentation Fault & Apache Blank Response

    - by Joe
    I recently updated a Debian Lenny server to php 5.3,5 using the dotdeb source. Soon after doing so certain (but not all) sites on the server stopped responding to requests. A blank response would be returned - no headers, no content, nothing. I found this related question on stackoverflow which seems to describe something similar and used the same code the user had in their answer to see if I could replicate the issue: <?php class A { public function __construct() { new B; } } class B { public function __construct() { new A; } } new A; print 'Loaded Class A'; ?> This triggered the problem - the page returned absolutely nothing despite the original question stating this was fixed in PHP 5.5.0. No CPU block as you'd expect, no wait, just an almost instant zero response. I then ran this same code from the cli (php -f test.php) and the only output I got was 'Segmentation fault'. Tailing the kernel log I've spotted: Feb 16 07:04:06 creature kernel: [192203.269037] php[17710] general protection ip:76ef37 sp:7fff155e9bb0 error:0 in php5[400000+870000] Feb 16 08:57:31 creature kernel: [199639.699854] apache2[31136]: segfault at 7fff13a84fe0 ip 7f730514ea40 sp 7fff13a85008 error 6 in libphp5.so[7f7304ce8000+915000] All extremely odd and I'm not sure what it's pointing to/what I should do to debug this further. As I said some sites work but code such as the above definitely trigger it. Not that the sites I want to server have code like that - it's just an example. Any help is much appreciated!

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  • What is the correct way to move a file?

    - by Joe McDonald
    We had an issue at my work where I cut and pasted some files. Immediately when I did it, a ton of files were lost. I've been working in IT for 10+ years. I know how to cut and paste a file. Well, when it went up to my managers as to why the files were lost, they deemed it to my cut and paste that caused all the problems and asked why in the world someone as knowledgeable as me would ever cut and paste a file, and didn't I know that was totally the wrong way to move a file? The correct way to move a file is to drag the file. When cutting and pasting, it moves that 1+ GB file (on the server) to the clipboard (on my PC), which, obviously, will cause problems. Dragging a file never hits the clipboard. Be honest, I don't believe that for a minute. I believe when I cut and paste text, it goes to the clipboard. I've seen it in the old versions of windows. But when right clicking on 100+ files that equals 1+ GB, I can't believe that all that data is copied immediately out of whatever share I'm on at the server across my wireless on my laptop to my local clipboard to just go back to the server to another share. It seems they would build some logic in the server OS or my local OS (more likely my local OS) that would say when copying files, don't perform the move action until I click paste and if the files are staying local to where they were before, just move them. So, who's right?

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  • Postfix relay all mail through SES except for one sending domain / address

    - by Kevin
    I'm thinking this is really really super simple, but I can't figure out what I need to do. I don't mess with Postfix much (Just let it run and do its thing) so I've got no idea where to even start with this. We have postfix currently configured to relay all mail out through SES using the code below. We need to modify this so that emails sent from one of our domains (domain.com) DO NOT go through SES. Everything else should continue to flow out through the SES connection. I'm assuming this is like a one line thing but my google skills are not helping me at all. relayhost = email-smtp.us-east-1.amazonaws.com:25 smtp_sasl_auth_enable = yes smtp_sasl_security_options = noanonymous smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd smtp_use_tls = yes smtp_tls_security_level = encrypt smtp_tls_note_starttls_offer = yes smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt smtp_destination_concurrency_limit = 450 Update I have created sender_transport file in /etc/postfix. In it is @domain.com smtp: I then ran this through postmap and placed sender_dependent_default_transport_maps = hash:/etc/postfix/sender_transport above the above block of code and restarted postfix, but still all email is going out through SES. Log after sending Oct 22 14:38:48 web postfix/smtp[19446]: 4B19D640002: to=<[email protected]>, relay=email-smtp.us-east-1.amazonaws.com[54.243.47.187]:25, delay=1.4, delays=0.01/0/0.92/0.44, dsn=2.0.0, status=sent (250 Ok 00000141e21b181f-ee6f7c4f-f0f5-4b0f-ba69-2db146a4f988-000000) Oct 22 14:38:48 web postfix/qmgr[19435]: 4B19D640002: removed I don't think this log is what you're looking for, but it's the only thing that is logged when mail goes out, and this is with me running /usr/sbin/postfix -v start manually and not with the init script.

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  • Preferred mail system/server for a company?

    - by Trevoke
    Say you are responsible for setting up an email solution at a company. Which would be your choice? I know of the following options, but many of them not well: Gordano Mail System Exchange Exim Postfix Qmail Zimbra For having used it a little over two years, I really, really like Gordano Mail System. They offer a whole bunch of things, like calendaring, anti-spam, anti-virus, extremely complete and filterable logging options, aliases, a customizable webmail interface... And their software can be installed on both a Windows or Linux OS. In addition, their support is top-notch, their knowledgebase comprehensive (and, I will admit with a touch of pride, I have contributed, with my questions, to the addition of a few articles in there). Of course, they're not free, which can be a problem, but they're not Exchange, and they do offer pretty much everything that Exchange offers -- which is great if you want to stay away from that, but need all the features. Although, if you need a Blackberry Exchange Server, or something similar, I'm not sure what you should go for. So.. What would your choice be? Why? I've never played with a more DIY email solution, but I'm sure many people here have and wouldn't trade their setup for the world :)

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  • Which AMI to to use for Java/Tomcat/MySQL in Amazon EC2?

    - by Justin
    I originally posted this on stackoverflow.com and it was suggested serverfault.com might be a better place to ask this question. So here goes: I'm trying to determine which Amazon Machine Image (AMI) to use as my Virtual Server in Amazon's EC2. For now, I'll need to choose an AMI that complies with the AWS Free Usage Tier. I want to deploy a Java app that I've been developing using Eclipse on Windows XP, Tomcat 7 and MySQL 5.5. I'm aware that I can choose the Basic 32-bit Amazon Linux AMI. Then I'd manually install Tomcat and MySQL (does MySQL get installed on the image or separately on an Elastic Block Store (EBS)?). Here's the rub, I'm a bit of a Linux noob. I can start Tomcat and tail the logs and such on Linux but I'm not familiar with the install process for Tomcat and MySQL on Linux and commands like sudo and chmod. I'm happy to get more hands on with Linux but I'm short on time right now. Are there AMI's that already have Tomcat and MySQL bundled? The Request Instance Wizard shows 805 Community AMI's that are Free Tier Eligible. 51 of the Free Tier Eligible AMI's have "Tomcat" in their name. I'm willing to consider using Elastic Beanstalk but my research thus far hasn't found any discussion of using MySQL with Beanstalk. The discussions all seem to use Amazon's SimpleDB. Any advice is greatly appreciated.

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  • Tunneling a public IP to a remote machine

    - by Jim Paris
    I have a Linux server A with a block of 5 public IP addresses, 8.8.8.122/29. Currently, 8.8.8.122 is assigned to eth0, and 8.8.8.123 is assigned to eth0:1. I have another Linux machine B in a remote location, behind NAT. I would like to set up an tunnel between the two so that B can use the IP address 8.8.8.123 as its primary IP address. OpenVPN is probably the answer, but I can't quite figure out how to set things up (topology subnet or topology p2p might be appropriate. Or should I be using Ethernet bridging?). Security and encryption is not a big concern at this point, so GRE would be fine too -- machine B will be coming from a known IP address and can be authenticated based on that. How can I do this? Can anyone suggest an OpenVPN config, or some other approach, that could work in this situation? Ideally, it would also be able to handle multiple clients (e.g. share all four of spare IPs with other machines), without letting those clients use IPs to which they are not entitled.

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  • How do I install Windows XP from an external hard drive?

    - by Plasmer
    I'm trying to install Windows XP Media Center edition by copying the install disc image to an external hard drive and making it bootable. Has anyone had success getting this to work on systems that can't boot from dvds/floppies? I'm basically working from this guide: http://www.dl4all.com/other/21495-install-windows-xp-from-usb.html Update - 2/15/10 I used WinToFlash on my laptop to format my usb hard drive from my install dvd (Windows XP Media Center Version 2005 with Update Rollup 2 from Dell) and selected "boot from usb device" at the boot selection menu and the windows installer started up. However, an error message came up saying that: "A problem has been detected and windows has been shut down to prevent damage to your computer." Originally on my desktop machine, I had 1 150Gb SATA drive, and 2 150 Gb SATA drives striped together using RAID. From the hard drive diagnostics, it appears the windows install on one of the RAIDed disks lost a block and this has been preventing me from booting up. I replaced the standalone drive with a new 1Tb SATA drive and disconnected the other hard drives. Could the message be indicating a virus is on the unformatted drive? or the usb hard drive? Update 2 - 2/15/10 The external hard drive didn't find any viruses when scanned. I tried installing Vista Home Premium 64bit SP1 using WinToFlash and that installed successfully onto the new 1Tb drive. WinToFlash was really easy to use and helped a lot, thanks!

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  • Vim - Displaying Code Output in a New Window á la Textmate?

    - by Michael Density
    A few months back I switched from Textmate to Vim. Overall I really love Vim, but one of the things I miss from Textmate is using the ⌘R command to run Ruby code and having the results neatly pop up in a new, scrollable window. Obviously, Vim is capable of running Ruby code and displaying the output with :w !ruby. The only downside to this is that if the resulting output is too long I can't scroll through it. To combat this problem I tried modifying a :redir function from Vim Tips. It looks like this: function! TabNew(cmd) redir => message silent execute a:cmd redir END tabnew silent put=message set nomodified endfunction command! -nargs=+ -complete=command TabNew call TabNew(<q-args>) Now the output from Ruby is put into a new tab. However, I can't get it to pop up in a new, separate window. Changing tabnew to new just sends the output to a split in the same window. The other problem is that a visible ^M gets appended to the end of each line, so the output ends up looking like this, which is kind of bothersome: Hello World!^M So, is there any way to get the output into a separate window without the ^M appended to the end? Are there any plugins I should be trying to achieve this Textmate-like effect for code output?

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  • Monitor displays at 1024x768; scrolls screen for higher resolutions

    - by Matt
    I have a dual monitor setup. Normally, they both display at 1680x1050. They have been setup this way for about a year. I'm using Windows XP Professional 2003 x64 SP2. Today, out of nowhere, one of the monitors kicked back to a lower resolution. I was not playing with any configuration at the time.. in fact all I had done was close a window (maybe a browser). But the thing is that the resolution is still preserved partially by the fact that the screen will scroll when you move the mouse. So it's like looking through a 1024x768 window into a 1680x1050 world. The monitor itself does not appear to be damaged, because I also have it connected to my netbook (via KVM) and higher resolutions work fine. I tried uninstalling/reinstalling the drivers to no avail. System restore doesn't help either. I'm unsure of the exact ATI card I'm using.. Device Manager lists it as "Radeon X300/X550/X1050". There is no Catalyst Control Center software installed. I tried to install it, but there doesn't seem to be a way to install it by itself ... it forces you to install another driver, which breaks both of my displays, forcing me to go into safe mode and run system restore again. Any ideas? Thanks

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  • Backup solution to backup terabytes and lots of static files on linux server?

    - by user28679
    Which backup tool or solution would you use to backup terabytes and lots of files on a production linux server ? Note that the files are all different and almost never modified, and usage is mostly adding files, so data volume is today 3TB growing all the time at around +15GB/day. Please do not reply rsync. Basic unix tools are not enough, rsync does not keep history, rdiff-backup miserably fails from time to time and screw the history. Moreover these are all file based backup, which put a lot of IOwait just to browse directories and query stat(). But i guess, except R1Soft CDP, there is no way around that. We tried R1Soft CDP backup, which is block level backup, and it proved good and efficient for all our other servers, but systematically fails on the server with 3 terabytes and gazillions of files. That is already more than 2 months that the engineers of R1Soft and datacenter are playing a hot ball game... and still no backup except regular rsync We never tried big commercial solutions, except R1Soft CDP since it was provided as an optional service by the datacented hosting our servers.

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  • Restoring Windows 2008 Server X86 and X64

    - by rihatum
    Restoring Windows 2008 Server (Domain Controller) We are using Backup Exec System Recovery 2010 to Image our DC. Now this software has a feature to convert the backup into a vmware or hyper-v VM I have also used disk2vhd to convert one of our dc's to a vhd and when I connected it into Hyper-V, it booted fine, I can login - BUT :-) As soon as I login, I get the activation error, that change product key, this product key isn't good for this machine etc. Question is : When in a real recovery situation, what would be the procedure to restore it either virtual or onto a physical box but be able to login and change product key etc ? In this scenario its just locked down and I cant' do anything, if this is the case, how would I replicate my production environment via these tools ? Any Ideas ? Will be grateful for some real world examples here. Same thing happens with our exchange backup / test restore either physical or virtual, can login but nothing else. Now we don't have the keys as they are OEM keys and just wondering what will happen in a real scenario, would we be purchasing another KEY or using the OEM key on our new server ? This is a test environment I am trying to create by restoring our backups either into hyper-v or physical test machines. Also, If I build up a machine (Server 2008) in a VM (Hyper-V), How can I restore just the system state backup of my DC into it ? will that give me the activation error too ? even though I would use the TRIAL ISOs provided by Microsoft ? Kind regards

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  • Allignment of ext3 partition on LVM RAID volume group

    - by John P
    I'm trying to add a partition on a LVM that resides on a RAID6 volume group and fdisk is complaining about the partition not residing on a physical sector boundry. My question is, how do you calculate the correct starting sector for a partition on a LVM? This partition will be formated ext3. Would it be better to just format the LVM directly instead of creating a new partition? Disk /dev/dedvol/backup: 2199.0 GB, 2199023255552 bytes 255 heads, 63 sectors/track, 267349 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 1048576 bytes / 8388608 bytes Disk identifier: 0x4e428f49 Device Boot Start End Blocks Id System /dev/dedvol/backup1 63 267349 2146982827+ 83 Linux Partition 1 does not start on physical sector boundary. lvdisplay /dev/dedvol/backup --- Logical volume --- LV Name /dev/dedvol/backup VG Name dedvol LV UUID OV2n5j-7LHb-exJL-t8dI-dU8A-2vxf-uIicCt LV Write Access read/write LV Status available # open 0 LV Size 2.00 TiB Current LE 524288 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 32768 Block device 253:1 vgdisplay dedvol --- Volume group --- VG Name dedvol System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 3 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 1 Max PV 0 Cur PV 1 Act PV 1 VG Size 14.55 TiB PE Size 4.00 MiB Total PE 3815448 Alloc PE / Size 3670016 / 14.00 TiB Free PE / Size 145432 / 568.09 GiB VG UUID 8fBcOk-aXGx-P3Qy-VVpJ-0zK1-fQgy-Cb691J

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  • Blocking an IP from connecting

    - by Sam W.
    I have a problem with my Apache webserver where there's and IP than connecting to my server, using alot of connection and wont die which eventually making my webserver timeout. The connection will stay as SYN_SENT state if I check using netstat -netapu I even flush my iptables and use the basic rules and it still doesn't work. The IP will get connected when I start my Apache Basic rules that I use: iptables -A INPUT -i lo -j ACCEPT iptables -A INPUT ! -i lo -d 127.0.0.0/8 -j REJECT iptables -A INPUT -s 89.149.244.117 -j REJECT iptables -A OUTPUT -s 89.149.244.117 -j REJECT iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A OUTPUT -j ACCEPT iptables -A INPUT -p tcp --dport 80 -j ACCEPT iptables -A INPUT -p tcp --dport 443 -j ACCEPT iptables -A INPUT -p tcp --dport 21 -j ACCEPT iptables -A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT iptables -A INPUT -j REJECT iptables -A FORWARD -j REJECT The bold part is rule in question. Not sure this is related but tcp_syncookies value is 1. Can someone point out my mistake? Is there a way to block it for good. Thank you

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  • Is my OCZ SSD aligned correctly? (Linux)

    - by Barney Gumble
    I have an OCZ Agility 2 SSD with 40 GB of space. I use it as a system drive in Debian Linux (Squeeze) and in my opinion it's really fast. But I've read a lot on aligning partitions and file systems... And I'm not sure if I succeeded in aligning the partitions correctly. Maybe the SSD could be even faster?? ;-) I use ext4 and here is the output of fdisk -cul: Disk /dev/sda: 40.0 GB, 40018599936 bytes 255 heads, 63 sectors/track, 4865 cylinders, total 78161328 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: [...] Device Boot Start End Blocks Id System /dev/sda1 * 2048 73242623 36620288 83 Linux /dev/sda2 73244670 78159871 2457601 5 Extended /dev/sda5 73244672 78159871 2457600 82 Linux swap / Solaris My partitions were created just by the Debian Squeeze setup assistant. So I didn't care about the details of partitioning. But now I think maybe the installer didn't align it correctly? Actually, 2048 looks good to me (better than odd values like 63 or something like that) but I've no idea... ;-) Help plz! According to some "SSD Alignment Calculator" I found on the web, the OCZ SSDs have a NAND Erase Block Size of 512kB and their NAND Page Size is 4kB. 2048 is divisible by 4 and 512. So are the partitions aligned correctly?

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  • HP Proliant DL380 G4 - Can this server still perform in 2011?

    - by BSchriver
    Can the HP Proliant DL380 G4 series server still perform at high a quality in the 2011 IT world? This may sound like a weird question but we are a very small company whose primary business is NOT IT related. So my IT dollars have to stretch a long way. I am in need of a good web and database server. The load and demand for a while will be fairly low so I am not looking nor do I have the money to buy a brand new HP Dl380 G7 series box for $6K. While searching around today I found a company in ATL that buys servers off business leases and then stripes them down to parts. They clean, check and test each part and then custom "rebuild" the server based on whatever specs you request. The interesting thing is they also provide a 3-year warranty on all their servers they sell. I am contemplating buying two of the following: HP Proliant DL380 G4 Dual (2) Intel Xeon 3.6 GHz 800Mhz 1MB Cache processors 8GB PC3200R ECC Memory 6 x 73GB U320 15K rpm SCSI drives Smart Array 6i Card Dual Power Supplies Plus the usual cdrom, dual nic, etc... All this for $750 each or $1500 for two pretty nicely equipped servers. The price then jumps up on the next model up which is the G5 series. It goes from $750 to like $2000 for a comparable server. I just do not have $4000 to buy two servers right now. So back to my original question, if I load Windows 2008 R2 Server and IIS 7 on one of the machines and Windows 2008 R2 server and MS SQL 2008 R2 Server on another machine, what kind of performance might I expect to see from these machines? The facts is this series is now 3 versions behind the G7's and this series of server was built when Windows 200 Server was the dominant OS and Windows 2003 Server was just coming out. If you are running Windows 2008 R2 Server on a G4 with similar or less specs I would love to hear what your performance is like.

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  • Windows 8 x64 with VMWare Workstation or inside ESXi

    - by Dommer
    I need to run several virtual machines on a core i7-920 box with 12GB or RAM and a 256GB SSD to host the VMs. It also has a Highpoint RocketRaid 2720SGL RAID controller with a 12TB RAID 5 array. I want one of my VMs to run Windows 8 x64, to have access to the RAID array as a native disk (not as networked drives and it needs to run at full speed) and to be able to send files quickly across the network. Initially I thought I'd try to do this using ESXi 5, but I have been unable to find any working RAID drivers for the RR2720SGL and it is not on the HCL for ESXi 5. In light of this, I have installed Windows 8 x64 on the hardware and am thinking of installing VMWare Workstation and running my VMs inside there. I guess my questions are these: How does VMWare Workstation 9 perform compared to ESXi 5? In the real world I mean? Presumably installing Win 8 as the host OS will give me way better performance for that Win 8 machine than Win 8 running under ESXi? I should stick with Windows 8 x64 as the host OS, right? If I install a domain controller VM inside my Win 8 box and join the Win 8 machine to that domain, am I insane (I would guess the Win 8 machine wouldn't see the domain controller until it finished starting everything up, but I don't think that matters)?! is it feasible to give metrics like this and if so, what is the likely value of x? 25%? 50%? 75%? Win 8 under ESXi runs x% as fast as Win 8 installed bare metal.

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  • High latency due to non-presence of a transit provider in my country

    - by nixnotwin
    My ISP, a state owned incumbent, buys bandwidth from different transit providers. Whenever it buys transits it announces only a specific prefix (in most cases a hitherto unused) through the new transit AS. For e.g. if it runs out of bandwidth, it buys bandwidth from a new transit and announces a new prefix through it, while the same prefix is not announced (or announced with lowest metrics, so that the routes are very rarely used) via the old transits which continue to provide bandwidth to it. I am a business customer, so I have a fiber based link to the ISP and a tiny subnet is given to me. The subnet which is provide to me is part of a prefix which is announced by the AS of a transit who, it seems, do not have a presence in my country. So when I do a trace the packets, when they leave my ISP's AS, they take about 275ms to reach the transit providers core router, which is located in USA (half the world away). Also for upstream traffic my ISP uses a transit provider (tier 1) who has a presence in my country. But the return path is always through the transit which is in USA. So, average latency is 400ms. All the users of other ISPs in my country discover my subnet via USA. Even the traffic from neighboring countries, from Europe (which is much nearer) follows the path via USA. Sites using CDNs also resolve to ips in USA. I have informed the ISP NOC about the issue and I have asked them to provide an ip subnet belonging to a prefix announced by a local transit (preferably a tier 1 transit provider) and I am waiting for a reply. My question: Is it a serious issue that I must follow up to get it resolved? When I compared the latency on other providers in my country, it is, in most cases, less than half of my ISPs latency. Why my ISP doesn't announce all its prefixes to all of its transit providers, so that the packets can take efficient and nearest routes to reach prefixes that originate within its network?

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  • Should I use "Raid 5 + spare" or "Raid 6"?

    - by Trevor Boyd Smith
    What is "Raid 5 + Spare" (excerpt from User Manual, Sect 4.17.2, P.54): RAID5+Spare: RAID 5+Spare is a RAID 5 array in which one disk is used as spare to rebuild the system as soon as a disk fails (Fig. 79). At least four disks are required. If one physical disk fails, the data remains available because it is read from the parity blocks. Data from a failed disk is rebuilt onto the hot spare disk. When a failed disk is replaced, the replacement becomes the new hot spare. No data is lost in the case of a single disk failure, but if a second disk fails before the system can rebuild data to the hot spare, all data in the array will be lost. What is "Raid 6" (excerpt from User Manual, Sect 4.17.2, P.54): RAID6: In RAID 6, data is striped across all disks (minimum of four) and a two parity blocks for each data block (p and q in Fig. 80) is written on the same stripe. If one physical disk fails, the data from the failed disk can be rebuilt onto a replacement disk. This Raid mode can support up to two disk failures with no data loss. RAID 6 provides for faster rebuilding of data from a failed disk. Both "Raid 5 + spare" and "Raid 6" are SO similar ... I can't tell the difference. When would "Raid 5 + Spare" be optimal? And when would "Raid 6" be optimal"? The manual dumbs down the different raid with 5 star ratings. "Raid 5 + Spare" only gets 4 stars but "Raid 6" gets 5 stars. If I were to blindly trust the manual I would conclude that "Raid 6" is always better. Is "Raid 6" always better?

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  • Knowledge and user generated content management system to track files, research, proposals, etc.?

    - by Eshwar
    I'll try keep it short. Here's the scenario: We have employees all over the world performing similar work i.e. research, generating powerpoint slides, word documents, graphics, etc. Many times a lot of this previous work can be reused for another future project. The current arrangement is email and phone calls which as you would agree is quick if you know where to look but otherwise archaic and very very inefficient. So I am looking for software that will allow me to do the following: Tag files e.g. an investor presentation on cellphone usage in kenya would be tagged investor, cellphone, kenya Manage references e.g. if we read something on the internet, should be able to paste that link in some fashion and tag it as above. Preferably cloud based so that it can be accessed by anybody and additionally would be nice (though NOT must) to have access levels (director, manager, everyone) A nice interface that non technically savvy folks can warm up to ;) A desktop app would be handy so that people don't always have to click upload or something A tree based system is inefficient in this case because content is usually linked across branches and also people might not quite agree on one format of a tree. Tagging works around this very nicely. What I have considered so far: Evernote (for its more professional look) Springpad (for its versatility with content) Mendeley (this is a research manager and in some ways ideal, but i fear its limited to PDFs) The goal is that when somebody wants to look for a document, they don't have to ask a colleague, they can just search with keywords and all relevant information shows up. Thanks!

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