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  • How to make a huge ram drive?

    - by Brandon Moore
    At my old job when a report was needed I could sit down with someone and pull up results and get immediate feedback, and then refine my queries and ultimately have the data we needed, in the format we needed within 30-90 minutes. I just started working for a new company with a database containing millions of records and I spent my whole 8 hours making a report that I feel I could have made in less than 2 hours if it were not for the massive amount of data the queries are working with, and the fact that I couldn't ask the person needing the data to sit down with me and give me feedback as I pulled up results as I am used to. So I am trying to think of how we can make the server faster... much faster, so that I can have the same level of productivity I'm used to. One thought that just came to mind is that memory is so cheap these days, and by my calculations I could buy 10 8gig ram sticks for 1000 bucks. What I have never heard of though is a device that would let me combine these into a huge ram drive. So I'd like to know if any such device exists, and if not what is the largest ram drive I could realistically make and how would I go about doing so? EDIT: To you guys who are saying the database shema needs to be analyzed... you can't make a query such as "Select f1, f2, f3, etc from SomeTable" run any faster by normalizing or indexing the table. What I'm talking about IS ABSOLUTELY a need for improved performance at the hardware level. I am used to having results come back to me in a few seconds, not a few minutes or much less a half an hour. Maybe that's what you guys are used to who have 100 billion record tables and you feel like that's fast, but I'm looking for results back from tables with about 10 million records to come back to me withing less than half a minute TOPS.

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  • I/O APIC on Virtualbox

    - by RidDeBakTiYar
    I'm trying to use the PIT to do APIC timer calibration, and I want to use the PIT through I/O APIC instead of PIC. On Bochs I get interrupts from the PIT at the asked frequency from the I/O APIC, while on Virtualbox I can't receive a single interrupt. It must be an I/O APIC configuration problem because as I unmask the first PIC entry, the IRQ fires. However that's not what I want. Can you imagine any possible condition that wouldn't make Virtualbox fire the IRQ? I'm not assuming single I/O APIC configuration (even though Virtualbox has only 1). I'm not assuming identity mappings between ISA IRQs and I/O APIC GSIs (using ACPI MADT table to get I/O APIC base address and Int override). I'm setting the Trigger Mode and Polarity bits correctly (on Virtualbox they are set as '00 - default' which means edge high right?). I'm putting the BSP APIC ID into the Destination field (using Physical destination) and vector 0x20. Being the BSP APIC ID 0 on Virtualbox, it ends up with 0x0000000000000020 written to the IOREDTBL. And, just in case I'm getting the wrong values from the Interrupt Override descriptor, I'm setting this value to all the IOREDTBL entries (I know this is very very bad, and it wont be kept as I understand what's going on). The only thing I didn't check out is Local APIC configuration. Actually I'm not writing any value to the BSP LAPIC. Just reading the APIC ID and using it to boot APs through IPIs. And obviously I'm setting bit 11 in the IA32_APIC_BASE MSR to enable the LAPIC. Any ideas? Thanks in advance.

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  • Gray Progress Bar in Macbook Boot caused by Partition Fault

    - by Konstantin Bodnya
    Here's my problem: When I try to load my macbook it shows the gray progress bar. It takes a while to fill the whole progress and after it macbook just shuts down. I tried to boot from recovery partition and run Disk Utility to repair it. Disk Utility showed my "Macintosh HD" in a gray color and failed to repair it. I thought all my data was lost, but then I tried the following: So I booted into ubunto from live usb and it successfully mounted my macintosh hd hfs+ partition. Parted shows me the following partitions on my disk: Disk /dev/sda: 500GB Sector size (logical/physical): 512B/512B Partition Table: gpt Number Start End Size File system Name Flags 1 20.5kB 210MB 210MB fat32 EFI System Partition boot 2 210MB 499GB 499GB hfs+ Macintosh HD 3 499GB 500GB 650MB hfs+ Recovery HD Seems legit except for FAT32 for EFI System Partition. Since all my data is okay and backed up what should I do to recover the system. I don't really want to reinstall all the system though I believe there's a command to make it allright in linux. Thank you everyone!

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  • Schedule Windows XP wallpaper change without additional apps

    - by Thomas
    Ideally, I'd like to be able to do this through a batch file or VB script, so I can schedule it to run at different times of the day (dark wallpaper at night vs. light wallpaper at day). I am aware of the many applications which could do this, but I prefer to keep only necessary applications running in the background.

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  • Does psexec support input redirection?

    - by aknuds1
    I am trying to control a remote Python script, which reads commands from stdin, via psexec 1.98, but I need to redirect psexec's input since psexec itself will be launched from another program. However, I have no luck making psexec accept redirected input. Is it supposed to work at all? An example of what I'm trying to do, where input is a file containing input to the remote script: psexec \\mymachine python c:\script.py < input

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  • Where is org.apache.tomcat.dbcp.dbcp.BasicDataSourceFactory for tomcat?

    - by Omnifarious
    On this page: http://tomcat.apache.org/tomcat-7.0-doc/jndi-resources-howto.html it describes how to set up a JNDI name for a DataSource resource. It tells you that Tomcat's standard data source factory is org.apache.tomcat.dbcp.dbcp.BasicDataSourceFactory, but I've searched every single jar file on my system after installing Tomcat on Fedora 17 and I cannot find one that contains this class. Where is it?

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  • Make a snapshot of a live mySQL database with myISAM & innoDB tables without locking

    - by Artem
    We have a live database in production where we are running out of space on the server. So I would like to transfer to a new server without any downtime (or as little downtime as possible). In general, I would also like to have a hot failover copy of the database available. I would like to use replication to get all of the data copied to the new machine, and then at some point flip a switch and have that new machine become the master (normal failover scenario). My problem is that I am not sure how to initialize replication without locking the db to make the initial snapshot I will use? Is there any way to do this? I know I could do it using single-transaction if I was using innoDB, but very unfortunately we have some myISAM tables in there (in fact the largest 150GB table is myISAM and I want to switch it to InnoDB but I can't do it until I have more space & a hot copy to switch to). Any ideas? Is there some way to make such a snapshot? Or is there alternatively a way to get replication to "catch up" without an snapshot for initialization?

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  • Make isolinux 4.0.3 chainload itself in VMWare

    - by chainloader
    I have a bootable iso which boots into isolinux 4.0.3 and I want to make it chainload itself (my actual goal is to chainload isolinux.bin v4.0.1-debian, which should start up the Ubuntu10.10 Live CD, but for now I just want to make it chainload itself). I can't get isolinux to chainload any isolinux.bin, no matter what version. It either freezes or shows a "checksum error" message. I'm using VMWare to test the iso. Things I have tried: .com32 /boot/isolinux/chain.c32 /boot/isolinux/isolinux-debug.bin (chainload self) this shows Loading the boot file... Booting... ISOLINUX 4.03 2010-10-22 Copyright (C) 1994-2010 H. Peter Anvin et al isolinux: Starting up, DL = 9F isolinux: Loaded spec packet OK, drive = 9F isolinux: Main image LBA = 53F00100 ...and the machine freezes. Then I've tried this (chainload GRUB4DOS 0.4.5b) chainloader /boot/isolinux/isolinux-debug.bin Result: Error 13: Invalid or unsupported executable format Next try: (chainload GRUB4DOS 0.4.5b) chainloader --force /boot/isolinux/isolinux-debug.bin boot Result: ISOLINUX 4.03 2010-10-22 Copyright (C) 1994-2010 H. Peter Anvin et al isolinux: Starting up, DL = 9F isolinux: Loaded spec packet OK, drive = 9F isolinux: No boot info table, assuming single session disk... isolinux: Spec packet missing LBA information, trying to wing it... isolinux: Main image LBA = 00000686 isolinux: Image checksum error, sorry... Boot failed: press a key to retry... I have tried other things, but all of them failed miserably. Any suggestions?

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  • Federated access to desktop and network resources in MS AD domains

    - by Glenn Stauffer
    We are looking for a way to provide members of three loosely connected organizations with access to authenticated resources such as file shares, printers, and lab computers. I've seen federation facilities for web resources; is ther something similar for domain logins? Our Active directory domains are not connected so we would have to use email addresses for the username to insure uniqueness. Is there any openid like mechanism that works for AD logins?

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  • Why do I have a different jump list for Outlook 2007

    - by Steve Crane
    I understand that the Windows 7 jump list for Outlook 2007 should look something like the one on the left, whereas mine, on the right contains only the three basic items and an ICS file I imported recently. I would like to have access to the commands for creating new items from my jump list. Can anyone explain why I don't get the other commands and what I might be able to do to enable them?

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  • Postfix relay gives error 450 while it should be 550

    - by dieter-be
    Hi, we use postfix to do relaying. We get several messages like the following in /var/log/mail (slightly edited) Apr 13 13:30:29 linserver postfix/smtpd[1064]: NOQUEUE: reject: RCPT from unknown[$ip]: 450 4.1.1 <[email protected]>: Recipient address rejected: undeliverable address: host domain.be [$ip] said: 550 <[email protected]>: Recipient address rejected: User unknown in virtual mailbox table (in reply to RCPT TO command); from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<BLUESTREAK.domain.local> Now, when the master mail servers gives a 550, claiming that the user does not exist, I want the relay to also give a 550 back. What happens now is that it seems to return a 450, causing clients to keep messages queued, keep trying and only notify users after a certain period has passed. According to what I could find, the soft_bounce could cause this. But we have not enabled this option (and by default it's off according to postfix docs) It might also have something to do with the *_reject_code postconf values. Especially since the log message complains the unknown ip. But as you can see in the postconf output below, smtpd_sender_restrictions and smtpd_client_restrictions are empty. So even if it would try to do any restrictions there, 550 is the "worst" error going on, so that's what I expect to be returned to the client. postconf: http://sprunge.us/JYgB Thanks, Dieter

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  • netbeans shortcuts

    - by coubeatczech
    hi, I have mapped several keys under <alt-gr> - <something> combination, but they don't work in netbeans, how do I cancel this netbeans overriding? thanks for answering... I'm working on linux, the keymap file has lines in the following manner: key <SPCE> { [ space, space, Return, nobreakspace ] };

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  • Software to block Facebook [closed]

    - by the_learner
    I wish to install a software in server of my office which can block facebook or any other website which I wish to block in client systems. (I dont want to edit host file for the same purpose) I google it out and found lots of them...but I am confused which is the best. Please suggest me some good blocking softwares along with download link (if providing link is possible, else no probz) Thanks in advance...

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  • LS command for torrent files

    - by amir-beygi
    Hi all I have a directory full of torrent files,and i have to download all of them; But the problem is i have disk limit in my remote server,and file sizes are vary(100MB~8GB) and if i add all of torrent files ,none of them would be download completely;So i need a command to list all my torrents and the size of them , to be selected and add to download list later . NOTE: REMOTE SERVER - LINUX_UBUNTU_9.10 // SSH So i need a command like torrentls That output somethings like: file1.torrent 1111MB file2.torrent 222MB file3.torrent 3333MB file4.torrent 444MB file5.torrent 5555MB

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  • Mapped drives not showing in first run of Windows Explorer

    - by Alistair McMillan
    We have a couple of users whose mapped drives don't always appear in Windows Explorer when they initially log in. "net use" shows the drives are mapped correctly and they can see them in File Open dialogs in other applications. However they don't appear in Windows Explorer. The current workaround we have is to kill Windows Explorer and then immediately start it again, then they do reliably appear. Any ideas?

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  • Directory Browsing on Apache

    - by Nina Sonbolian
    I am listing a couple of stuff that I want people to download for my school and remembered that some sites had directory browsing done with cool little icons displaying the file types. I wanted to do this myself and felt that the default directory browsing of apache is just too plain and IndexOptions +FancyIndexing is a bit 'old'. Any nice jQuery based Web 2.0ish stuff out there for this particular purpose. The files are .debs, .exes, .iso, .zip etc. Thanks!

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  • webpage accessibility

    - by amit upadhyay
    hi, i have a strange requirement. I want to access a page on my site through a link say www.abc.com/downloads/file.txt but i also want that if anybody enters only www.abc.com/downloads it should not be accessible or it should display access denied. How can i do that???????

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  • Symlink error when installing MySQL via Homebrew

    - by Asad Syed
    Trying to install MySQL via Homebrew. The install seems to work fine but i get an error: "Error: The linking step did not complete successfully The formula built, but is not symlinked into /usr/local You can try again using `brew link mysql'" Naturally, after this I ran: brew link mysql Which spat out: Error: Could not symlink file: /usr/local/Cellar/mysql/5.5.20/include/typelib.h /usr/local/include is not writable. You should change its permissions. So I ran it with sudo and got a "cowardly refusing to brew link mysql".

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  • Is it possibile to alow port forwarding only for specific IP public addresses

    - by adopilot
    I have freeBSD router and it host public IP address, I am using ipnat.rules to configure port forwarding prom public network inside my private network. Now I wondering can I restrict only specific public IP addresses to can pass trough my port forwarding. What I want is to only my specific public IP addresses can walk inside my network on specific ports. Here is how now look like my ipnat.rules file rdr fxp0 217.199.XXX.XXX/32 port 7900-> 192.168.1.12 port 80 tcp

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