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  • SBS 2008 - Add user not seeing AD users (reconnecting or creating new mailbox)

    - by Robert
    Using SBS 2008 - completely updated. I was originally trying to create a spam mailbox for quarantine purposes, and when I bring up the "select an existing user" it does not display any of the domain users (other than QB database user accounts installed on their server). I have tried changing the scope and still nothing. Searching reveals nothing either. Then later I noticed that we had (1) disconnected mailbox, and I tried to reconnect it to the AD user - and I got the same results. Help would be much appreciated.

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  • Streaming Flash Video - getting my feet wet

    - by Travis
    I'm working on a project that will involve having a couple thousand short videos online. I haven't done anything with online video before and this is all a bit new to me, so I am looking for some general advice... I would like to use Flowplayer, and I would like to encode the videos as H264s. I am enamoured with Flowplayer's slow motion feature, which if I understand correctly, is only available using a Wowza server. I'm wondering: Is it advisable to use a delivery network of some sort? (Flowplayer seems to have a partnership with HDDN, and recommends them. http://www.hddn.com/) Or would I be better off purchasing Wowza and installing it on our own server? (At first glance, it looks as though signing up with a network like HDDN is much simpler, but perhaps there are problems that come along with this...?) Any tips / warnings of imminent peril would be much appreciated. Thanks in advance.

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  • Weighted round robins via TTL - possible?

    - by Joe Hopfgartner
    I currently use DNS round robin for load balancing, which works great. The records look like this (I have a ttl of 120 seconds) ;; ANSWER SECTION: orion.2x.to. 116 IN A 80.237.201.41 orion.2x.to. 116 IN A 87.230.54.12 orion.2x.to. 116 IN A 87.230.100.10 orion.2x.to. 116 IN A 87.230.51.65 I learned that not every ISP / device treats such a response the same way. For example some DNS servers rotate the addresses randomly or always cycle them through. Some just propagate the first entry, others try to determine which is best (regionally near) by looking at the ip address. However if the userbase is big enough (spreads over multiple ISPs etc) it balances pretty well. The discrepancies from highest to lowest loaded server hardly every exceeds 15%. However now I have the problem that I am introducing more servers into the systems, that not all have the same capacities. I currently only have 1gbps servers, but I want to work with 100mbit and also 10gbps servers too. So what I want is I want to introduce a server with 10 GBps with a weight of 100, a 1 gbps server with a weight of 10 and a 100 mbit server with a weight of 1. I used to add servers twice to bring more traffic to them (which worked nice. the bandwidth doubled almost.) But adding a 10gbit server 100 times to DNS is a bit rediculous. So I thought about using the TTL. If I give server A 240 seconds ttl and server B only 120 seconds (which is about about the minimum to use for round robin, as a lot of dns servers set to 120 if a lower ttl is specified.. so i have heard) I think something like this should occour in an ideal scenario: first 120 seconds 50% of requests get server A -> keep it for 240 seconds. 50% of requests get server B -> keep it for 120 seconds second 120 seconds 50% of requests still have server A cached -> keep it for another 120 seconds. 25% of requests get server A -> keep it for 240 seconds 25% of requests get server B -> keep it for 120 seconds third 120 seconds 25% will get server A (from the 50% of Server A that now expired) -> cache 240 sec 25% will get server B (from the 50% of Server A that now expired) -> cache 120 sec 25% will have server A cached for another 120 seconds 12.5% will get server B (from the 25% of server B that now expired) -> cache 120sec 12.5% will get server A (from the 25% of server B that now expired) -> cache 240 sec fourth 120 seconds 25% will have server A cached -> cache for another 120 secs 12.5% will get server A (from the 25% of b that now expired) -> cache 240 secs 12.5% will get server B (from the 25% of b that now expired) -> cache 120 secs 12.5% will get server A (from the 25% of a that now expired) -> cache 240 secs 12.5% will get server B (from the 25% of a that now expired) -> cache 120 secs 6.25% will get server A (from the 12.5% of b that now expired) -> cache 240 secs 6.25% will get server B (from the 12.5% of b that now expired) -> cache 120 secs 12.5% will have server A cached -> cache another 120 secs ... i think i lost something at this point but i think you get the idea.... As you can see this gets pretty complicated to predict and it will for sure not work out like this in practice. But it should definitely have an effect on the distribution! I know that weighted round robin exists and is just controlled by the root server. It just cycles through dns records when responding and returns dns records with a set propability that corresponds to the weighting. My DNS server does not support this, and my requirements are not that precise. If it doesnt weight perfectly its okay, but it should go into the right direction. I think using the TTL field could be a more elegant and easier solution - and it deosnt require a dns server that controls this dynamically, which saves resources - which is in my opinion the whole point of dns load balancing vs hardware load balancers. My question now is... are there any best prectices / methos / rules of thumb to weight round robin distribution using the TTL attribute of DNS records? Edit: The system is a forward proxy server system. The amount of Bandwidth (not requests) exceeds what one single server with ethernet can handle. So I need a balancing solution that distributes the bandwidth to several servers. Are there any alternative methods than using DNS? Of course I can use a load balancer with fibre channel etc, but the costs are rediciulous and it also increases only the width of the bottleneck and does not eliminate it. The only thing i can think of are anycast (is it anycast or multicast?) ip addresses, but I don't have the means to set up such a system.

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  • zimbra server server not sync with ldap server

    - by shreedhar.bh
    Please help me out I am intermediate on linux, 1) I do have zimbra mail server on ubuntu with ladap server and external openldap server in internal location 2) last weak we got renewed the SSL certificate on Zimbra server 3) after renewed the SSL certificate with 10 years in Zimber server its not able to sync the ladap details with internal OpenLdap server Please help me to fix this issue In advance thanks Regards Shreedhar.BH

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  • Database/Web Server and SQL Server Setup - Security?

    - by Jess
    This seems really basic, but I couldn't find an answer already ... we are looking to deploy a website to an IIS server, and a database to a separate server. We aren't sure how to best secure this for access by internal users and internet. The IIS Server is not connected to the domain, and neither is the database at the moment. Should it be? Also, if we use SQL Server authentication instead of Windows Authentication, should we just hard-code the user/password into our internal apps?

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  • Iptables blocking mysql port 3306

    - by valmar
    I got a Tomcat server running a web application that must access a mysql server via Hibernate on the same machine. So, I added a rule for port 3306 to my iptables script but tomcat cannot connect to the mysql server for some reason. I need to reset all iptables rules - Then tomcat can connect to the mysql server again. All the other iptables rules work perfectly though. What's wrong? Here is my script: iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT iptables -A INPUT -p tcp --dport 24 -j ACCEPT iptables -A INPUT -p tcp --dport 80 -j ACCEPT iptables -A OUTPUT -p tcp --dport 80 -j ACCEPT iptables -A INPUT -p tcp -s localhost --dport 8009 -m state --state ESTABLISHED -j ACCEPT iptables -A OUTPUT -p tcp -d localhost --dport 8009 -j ACCEPT iptables -A INPUT -p tcp -s localhost --dport 3306 -j ACCEPT iptables -A OUTPUT -p tcp -d localhost --dport 3306 -j ACCEPT iptables -A INPUT -p tcp --dport 443 -j ACCEPT iptables -A OUTPUT -p tcp --dport 443 -j ACCEPT iptables -A INPUT -p tcp --dport 25 -m state --state ESTABLISHED -j ACCEPT iptables -A OUTPUT -p tcp --dport 25 -j ACCEPT iptables -A INPUT -p tcp --dport 587 -m state --state ESTABLISHED -j ACCEPT iptables -A OUTPUT -p tcp --dport 587 -j ACCEPT iptables -A INPUT -p tcp --dport 465 -m state --state ESTABLISHED -j ACCEPT iptables -A OUTPUT -p tcp --dport 465 -j ACCEPT iptables -A INPUT -p tcp --dport 110 -m state --state ESTABLISHED -j ACCEPT iptables -A OUTPUT -p tcp --dport 110 -j ACCEPT iptables -A INPUT -p tcp --dport 995 -m state --state ESTABLISHED -j ACCEPT iptables -A OUTPUT -p tcp --dport 995 -j ACCEPT iptables -A INPUT -p tcp --dport 143 -m state --state ESTABLISHED -j ACCEPT iptables -A OUTPUT -p tcp --dport 143 -j ACCEPT iptables -A INPUT -p tcp --dport 993 -m state --state ESTABLISHED -j ACCEPT iptables -A OUTPUT -p tcp --dport 993 -j ACCEPT iptables -A INPUT -j DROP My /etc/hosts file: # nameserver config # IPv4 127.0.0.1 localhost 46.4.7.93 mydomain.com 46.4.7.93 Ubuntu-1004-lucid-64-minimal 46.4.7.93 horst # IPv6 ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3 ip6-allhosts Having a look into the iptables logs, gives me this: Jun 22 16:52:43 Ubuntu-1004-lucid-64-minimal kernel: [ 435.111780] denied-input IN=lo OUT= MAC=00:00:00:00:00:00:00:00:00:00:00:00:08:00 SRC=127.0.0.1 DST=127.0.0.1 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=52432 DF PROTO=TCP SPT=56108 DPT=8009 WINDOW=32792 RES=0x00 SYN URGP=0 Jun 22 16:52:46 Ubuntu-1004-lucid-64-minimal kernel: [ 438.110555] denied-input IN=lo OUT= MAC=00:00:00:00:00:00:00:00:00:00:00:00:08:00 SRC=127.0.0.1 DST=127.0.0.1 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=52433 DF PROTO=TCP SPT=56108 DPT=8009 WINDOW=32792 RES=0x00 SYN URGP=0 Jun 22 16:52:46 Ubuntu-1004-lucid-64-minimal kernel: [ 438.231954] denied-input IN=lo OUT= MAC=00:00:00:00:00:00:00:00:00:00:00:00:08:00 SRC=127.0.0.1 DST=127.0.0.1 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=48020 DF PROTO=TCP SPT=56109 DPT=8009 WINDOW=32792 RES=0x00 SYN URGP=0 Jun 22 16:52:49 Ubuntu-1004-lucid-64-minimal kernel: [ 441.229778] denied-input IN=lo OUT= MAC=00:00:00:00:00:00:00:00:00:00:00:00:08:00 SRC=127.0.0.1 DST=127.0.0.1 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=48021 DF PROTO=TCP SPT=56109 DPT=8009 WINDOW=32792 RES=0x00 SYN URGP=0 Jun 22 16:53:57 Ubuntu-1004-lucid-64-minimal kernel: [ 508.731839] denied-input IN=eth0 OUT= MAC=6c:62:6d:85:bf:0e:00:26:88:75:dc:01:08:00 SRC=78.92.97.67 DST=46.4.7.93 LEN=64 TOS=0x00 PREC=0x00 TTL=122 ID=23053 DF PROTO=TCP SPT=1672 DPT=445 WINDOW=65535 RES=0x00 SYN URGP=0 Jun 22 16:53:59 Ubuntu-1004-lucid-64-minimal kernel: [ 511.625038] denied-input IN=eth0 OUT= MAC=6c:62:6d:85:bf:0e:00:26:88:75:dc:01:08:00 SRC=78.92.97.67 DST=46.4.7.93 LEN=64 TOS=0x00 PREC=0x00 TTL=122 ID=23547 DF PROTO=TCP SPT=1672 DPT=445 WINDOW=65535 RES=0x00 SYN URGP=0 Jun 22 16:54:22 Ubuntu-1004-lucid-64-minimal kernel: [ 533.981995] denied-input IN=eth0 OUT= MAC=6c:62:6d:85:bf:0e:00:26:88:75:dc:01:08:00 SRC=27.254.39.16 DST=46.4.7.93 LEN=48 TOS=0x00 PREC=0x00 TTL=117 ID=6549 PROTO=TCP SPT=6005 DPT=33796 WINDOW=64240 RES=0x00 ACK SYN URGP=0 Jun 22 16:54:44 Ubuntu-1004-lucid-64-minimal kernel: [ 556.297038] denied-input IN=eth0 OUT= MAC=6c:62:6d:85:bf:0e:00:26:88:75:dc:01:08:00 SRC=94.78.93.41 DST=46.4.7.93 LEN=40 TOS=0x00 PREC=0x00 TTL=52 ID=7712 PROTO=TCP SPT=57598 DPT=445 WINDOW=512 RES=0x00 SYN URGP=0

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  • Rename file in Amazon Glacier

    - by Benjamin
    Is it possible to rename an archive in Amazon Glacier? The documentation says: After you upload an archive, you cannot update its content or its description. The only way you can update the archive content or its description is by deleting the archive and uploading another archive. That would lead me to think that it's not possible, but I'm not sure whether the file name is considered part of the archive description.

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  • How can i control how much Authority RRs a DNS answer returns ?

    - by Benoît
    Hello, i quite don't understand Authority RRs. Using dig to resolve some random A records, my caching DNS server sometimes also return Authority RRs and sometimes not. The number and the type of the returned Authority RRs also vary a lot. What does control whether Authority RRs are returned or not on a standard client query ? Is it a client or server setting ? What does control how many Authoriy RRs are returned ? What does control of the type of the Authority RRs records returned ? Sometimes it's multiple NS, sometimes it's a SOA. It's also often comes with Additional RRs of type A about the Authority RRs NS returned. I'm really looking for a RFC or kind of describing this. Thanks.

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  • MSSQL Backup Question

    - by MJ
    I'm currently taking over for someone who was in charge of backing up over 250 servers on different platforms, until we hire a replacement. The main question I have is: If we use a backup software, such as Symantec backup exec, does this perform the correct backup for MSSQL Server? I was listening to Stack Overflow Podcast, and I heard them talk about you cannot just backup the SQL data files, but you also need the transaction log? So, if we just backup the whole machine, would we be able to recover it correctly, since we would be backing up the data file and the log? Thanks!

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  • Strange port forwarding problem

    - by rAyt
    I've got a strange port forwarding problem. The port forwarding to my internal webserver (10.0.0.10 on Port 80) works without a problem but the port forwarding to a windows server (10.0.0.15) on port 3389 doesn't work. The port 3389 is open. Any ideas? thanks! #!/bin/sh IPTABLES="/sbin/iptables" $IPTABLES --flush $IPTABLES --table nat --flush $IPTABLES --delete-chain $IPTABLES --table nat --append POSTROUTING --out-interface eth0 -j MASQUERADE $IPTABLES -t nat -A PREROUTING -p tcp -i eth0 -d 188.40.XXX.XXX --dport 3389 -j DNAT --to 10.0.0.15:3389 $IPTABLES -t nat -A PREROUTING -p tcp -i eth0 -d 188.40.XXX.XXX --dport 80 -j DNAT --to 10.0.0.10:80 $IPTABLES -t nat -A PREROUTING -p tcp -i eth0 -d 188.40.XXX.XXX --dport 222 -j DNAT --to 10.0.0.10:22 $IPTABLES --append FORWARD --in-interface eth1 -j ACCEPT

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  • IT Audit checklist

    - by PHLiGHT
    I recently have taken on the position of a one man show for a company that is going to have an audit. The network isn't anywhere close to prepared and I have been looking for a general audit checklist since one hasn't been provided by the auditors and haven't found much good information out there. Does anyone have a nice template that will give me a good starting point. I know that this will be highly customized to the company but a starting point will be helpful to outline to management just how much work is needed. Thanks,

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  • lighttpd: weird behavior on multiple rewrite rule matches

    - by netmikey
    I have a 20-rewrite.conf for my php application looking like this: $HTTP["host"] =~ "www.mydomain.com" { url.rewrite-once += ( "^/(img|css)/.*" => "$0", ".*" => "/my_app.php" ) } I want to be able to put the webserver in kind of a "maintenance" mode while I update my application from scm. To do this, my idea was to enable an additional rewrite configuration file before this one. The 16-rewrite-maintenance.conf file looks like this: url.rewrite-once += ( "^/(img|css)/.*" => "$0", ".*" => "/maintenance_app.php" ) Now, on the maintenance page, I have a logo that doesn't get loaded. I get a 404 error. Lighttpd debug says the following: 2012-12-13 20:28:06: (response.c.300) -- splitting Request-URI 2012-12-13 20:28:06: (response.c.301) Request-URI : /img/content/logo.png 2012-12-13 20:28:06: (response.c.302) URI-scheme : http 2012-12-13 20:28:06: (response.c.303) URI-authority: localhost 2012-12-13 20:28:06: (response.c.304) URI-path : /img/content/logo.png 2012-12-13 20:28:06: (response.c.305) URI-query : 2012-12-13 20:28:06: (response.c.300) -- splitting Request-URI 2012-12-13 20:28:06: (response.c.301) Request-URI : /img/content/logo.png, /img/content/logo.png 2012-12-13 20:28:06: (response.c.302) URI-scheme : http 2012-12-13 20:28:06: (response.c.303) URI-authority: localhost 2012-12-13 20:28:06: (response.c.304) URI-path : /img/content/logo.png, /img/content/logo.png 2012-12-13 20:28:06: (response.c.305) URI-query : 2012-12-13 20:28:06: (response.c.349) -- sanatising URI 2012-12-13 20:28:06: (response.c.350) URI-path : /img/content/logo.png, /img/content/logo.png 2012-12-13 20:28:06: (mod_access.c.135) -- mod_access_uri_handler called 2012-12-13 20:28:06: (response.c.470) -- before doc_root 2012-12-13 20:28:06: (response.c.471) Doc-Root : /www 2012-12-13 20:28:06: (response.c.472) Rel-Path : /img/content/logo.png, /img/content/logo.png 2012-12-13 20:28:06: (response.c.473) Path : 2012-12-13 20:28:06: (response.c.521) -- after doc_root 2012-12-13 20:28:06: (response.c.522) Doc-Root : /www 2012-12-13 20:28:06: (response.c.523) Rel-Path : /img/content/logo.png, /img/content/logo.png 2012-12-13 20:28:06: (response.c.524) Path : /www/img/content/logo.png, /img/content/logo.png 2012-12-13 20:28:06: (response.c.541) -- logical -> physical 2012-12-13 20:28:06: (response.c.542) Doc-Root : /www 2012-12-13 20:28:06: (response.c.543) Rel-Path : /img/content/logo.png, /img/content/logo.png 2012-12-13 20:28:06: (response.c.544) Path : /www/img/content/logo.png, /img/content/logo.png 2012-12-13 20:28:06: (response.c.561) -- handling physical path 2012-12-13 20:28:06: (response.c.562) Path : /www/img/content/logo.png, /img/content/logo.png 2012-12-13 20:28:06: (response.c.618) -- file not found 2012-12-13 20:28:06: (response.c.619) Path : /www/img/content/logo.png, /img/content/logo.png Any clue on why lighttpd matches both rules (from my application rewrite config and from my maintenance rewrite config) and concatenates them with a comma - that doesn't seem to make any sense?! Shouldn't it stop after the first match with rewrite-once?

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  • What virtual machine software for fail-over and snapshots?

    - by consolibyte
    We're looking to virtualize a few machines with the hope that we can: a) Take "snapshots" of a machine to use as backups b) Implement a system where if the software/hardware fails, we can quickly and easily load up an recent snapshot on new hardware and replace the failed machine with a new one. As always, cost is a concern- there's only 3 or 4 servers we're going to do this with, so we don't want to drop $50,000 on this. I'm confused by all of the different virtual machine offerings. Which one is does what I want, and does it easily?

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  • Netinstalling CentOS if the gateway is in a different subnet

    - by James Lawrie
    I have a KVM host (A) running a virtual machine (B). They each have their own external IP address and the networking is setup using bridging between eth0 and br0 on A. B uses eth0, with A being the gateway. The problem is that the two external IP addresses are on different subnets (different /8s in fact) so by default, B claims it cannot reach A (Network Unreachable). I can resolve this by adding a static route on B: echo "any host gateway_ip dev eth0" > /etc/sysconfig/static-routes Modifying /etc/init.d/networking to reload the gateway after applying static routes (I only added the final line before fi): if [ -f /etc/sysconfig/static-routes ]; then grep "^any" /etc/sysconfig/static-routes | while read ignore args ; do /sbin/route add -$args done route add default gw "${GATEWAY}" fi If I then restart networking, it comes online. How can I do this (or work around it some other way) prior to the system being installed, ideally inside an Anaconda kickstart file?

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  • Just LB or also Web Servers in Demilitarized Zone?

    - by Bradford
    In a load balanced environment, is it necessary to have all of the web servers in the DMZ? Or will just having the Load Balancer in the DMZ achieve the desired security? If it matters, the web server and application server are the same -- GF, Tomcat fronted by httpd on the same server, OAS, etc... LB - WEB/APPLICATION - DB Also, would the setup be different if it was LB - Web Server - Application Server - DB Thanks, Bradford

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  • NAS disk - problem with accessing SAMBA

    - by dominolog
    Hello I have a NAS disk running on some version of Linux. The disk is located in local network (5 PC running XP or Vista, all connected to Linksys Router). I have problems accessing NAS resources through SAMBA. The 1st issue is that the NAS is not accessible through hostname (even if it is configured), 2nd point is that it is mostly not accessible through IP manner (\IP_OF_NAS). Rest of services (FTP, HTTP access) works flawlessly. I connected the NAS to my home network (only 1 WinXP and Linsys router) and the NAS is working fine - SAMBA access together with hostname recognition works perfectly. I wonder this is an issue with WINS? Could anybody help? Regards

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  • SQL 2K5 - Multiple databases vs. Multiple files

    - by Bob Palmer
    Hey all, quick question. Our current legacy system was built using multiple distinct databases (about ten of them). These are all part of the same discreet system, and a large number of SPs and functionalty span multiple databases. There are also key relationships that span (for example, a header table may be in database A with history, etc. in database B). When deploying multiple copies of our app to the same server therefore, we have to use multiple instances (because the database names are coded into so many sprocs). We're evaluating the idea of taking these ten databases (about 30gb total with individual sizes ranging from 100mb to 10gb) and merging them into a single database. Currently, we have our databases spread accross multiple spindles for better IO. The question I have is whether or not there is any performance loss or benefit of having 10 different databases vs. 10 different database files? i.e. rather than having three databases (A, B, and C) Disk D: A.mdf (1gb) Disk E: B.mdf (4gb) Disk F: C.mdf (10gb) Disk G: A_Log.ldf, B_Log.ldf, C_Log.ldf have one database (X) Disk D: X1.mdf (5gb) Disk E: X2.mdf (5gb) Disk F: X3.mdf (5gb) Disk G: X1_log.ldf,X2_log.ldf,X3_log.ldf Thanks! -Bob

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  • What are the challenges when my enterprise desires to move the processing component of an applicatio

    - by Berkay
    Assume that i have an enterprise accounting application that consists of a front-end interface, a processing tier, and a back-end database. This is an application that contains private business data, and thus is traditionally run in a secure private network environment within the enterprise. What are the challenges that appear when my enterprise desires to move the processing component of this application to a cloud computing data center in order to achieve greater scalability or to reduce IT costs ? Pls note: do i have to make significant changes to my own infrastructure to enable external access to formerly private resources? do i have to modify the application code to handle new network topology ? thanks, if you give your answers in a simple manner, really appreciated.

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  • Changing IP on Domain Controller?

    - by Beuy
    I'm considering changing the IP on a 2008 Domain Controller, anything that I should be aware of to look out for? Will be doing this on a Saturday night to, leases renew every 24 hours so by Monday morning all the machines will have valid DHCP leases with correct DNS servers. Have a list of all machines on static IP so I know to update them while I'm at it.

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  • IBM Server Config questions

    - by Joel Coel
    I have a few questions on a potential server setup. First, the situation: Last year we bought an IBM x3500 server with 2 Xeon E5410's, 9GB RAM, 6 HDDs. The original intent for this server was to replace the old exchange e-mail server. It was brought in, set up, and then shortly after we switched to gmail. Shortly after that my predecessor left for greener pastures, and finally I was hired. So this nice server is now sitting (mostly) idle. This year I have budget again for one server, and of course I want to put this other server to work. I'm thinking about the best use for the two server, and I think I finally have a plan for what I want to do with them. The idea is to use the two newer servers as a pair of VM hosts. I will set up each server with the same 8 VMs, but divide up the load so that only 4 are active per physical host. That means I've normally got 2GB RAM + 2 cores per host. I've done some load testing to pick out what servers to convert to virtual, and chose them so that each host will be capable of handling the entire set of 8 by itself in a pinch with 1 core and 1GB RAM, but would be very taxed to do so. This should take our data center from 13 total servers down to 7. The "servers" I'm replacing are mostly re-purposed desktops, so I'm more than happy to be able to do this. Now it's time to go shopping for the new server. I'd like my two hosts to match as closely as possible, and so I'm looking at IBM again. It also helps that we have some educational matching grant money from IBM that I need to use to help pay for this system (we're a small private college). So finally, (if you're not bored already), we come to my questions: Am I missing anything big or obvious in this plan? I'm a little worried about network performance since the VM hosts will only have 4 nics total where 8 used to be, but I don't think it will be a problem. Is there anything else like this I might be overlooking? Am I making it even too complicated? IBM no longer has a good analog to last year's server. If I want to match the performance (8 cores, 9GB RAM, 1333mhz front side bus, 6 spindles), I have to spend quite a bit more than we paid last year: $2K+, or nearly a 33% cost increase. This only brings a marginal increase in performance. The alternative to stay in budget is to take a hit on the fsb down to 800mhz or cut the number of cores in half, neither of which is attractive. The main cost culprit is the processor. IBM no longer offers the E5410. It's listed as a part, but not available in any of the server configs I've looked at. I'm considering getting the cheapest 800mhz fsb dual core xeon I can configure and then buying the E5410's separately. That's still an extra $350 I wasn't counting on, but that's better than $2K. I want to know what others think of this - will it work or will I end up with the wrong motherboard or some other issue? Am I missing a simple way to configure the server I really want? I don't really intend to do this, but one option to save some money back is to omit the redundant power supply. Since my redundancy plan for these system is to switch over to a completely different host, the extra power isn't fully necessary. That said, it's still very helpful to avoid even short downtimes while I switch over VMs. Has anyone done this?

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  • Xen 4.1.2 unable to boot

    - by Devator
    I have installed Xen 3.1.2 perfectly, and it's running fine. However since that version is way outdated I just updated it to 4.1.2 by adding the gitco repository and then yum update. It installed fine, modified my grub.conf to reflect the changes but then on a reboot, it simply doesn't come back online (I can't see what's going on, as it's a rented dedicated server). What are my options? Booting into rescue mode and using the older kernel works fine, it will come back up. But once I use the xen.gz-4.1.2kernel, it won't come back up anymore and I need to use the rescue image.. My /boot/grub/grub.confis as follows: title CentOS (2.6.18-308.1.1.el5xen) root (hd0,1) #kernel /xen.gz-2.6.18-308.1.1.el5 dom0_mem=1024M kernel /xen.gz-4.1.2 module /vmlinuz-2.6.18-308.1.1.el5xen ro root=/dev/md1 module /initrd-2.6.18-308.1.1.el5xen.img When I uncomment the 3.1.2 kernel, it works fine, but booting with the 4.1.2 kernel fails and I have no idea what's going on. Hence my question: what are my options?

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