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Thread: Ubuntu Server 12.04 LTS released

  1. #11
    LHammonds's Avatar
    LHammonds is offline Special Member
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    Quote Originally Posted by shal View Post
    Thanks for your help.

    I think I will install Zimbra on RAID1 and will migrate to SSDs when they are supported properly.
    Whew! I was reading this with my *eeek* face and was worried for you.
    Type su - zimbra -c "zmcontrol -v" to get your version and copy that into your profile (more info here)

  2. #12
    Brad_C is offline Loyal Member
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    Bah. No sense of adventure!


  3. #13
    shal is offline Intermediate Member
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    Quote Originally Posted by LHammonds View Post
    Whew! I was reading this with my *eeek* face and was worried for you.
    In fact I have only 15 users and ~80Gb of emails in Thunderbird mailboxes. I hope HDDs would work fine.
    At the moment we do not have a mail server at all and I do not know how fast Zimbra would work (we will use it via Web interface).

    I have two Intel SSD X25-E 32Gb but having read some forums I even did not get how to install system. Seems people are getting a lot of problems when using SSDs. (installation, filesystem, mount options, formatting, TRIM or fstrim, mounting LOG, TEMP, swap, etc, kernel problems, SSD lifetime and wearout, BIOS and so on).

    Brad_C, yes no sense of adventure.
    I do not need adventures like crashing of servers, while people are working in the office.

    I want to build a fast system very much but it must be RELIABLE.

    The problem is that I do not have strict guidelines, HOW TO install Ubuntu server 10.04 on SSD. a lot of opinions but no tested instructions.

    Maybe you will give me some links, some HOWTOs those are TESTED for a LONG period of time. I would be very grateful.

    thanks in advance

  4. #14
    Brad_C is offline Loyal Member
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    Quote Originally Posted by shal View Post
    I have two Intel SSD X25-E 32Gb but having read some forums I even did not get how to install system. Seems people are getting a lot of problems when using SSDs. (installation, filesystem, mount options, formatting, TRIM or fstrim, mounting LOG, TEMP, swap, etc, kernel problems, SSD lifetime and wearout, BIOS and so on).
    Here's the thing. Installing 12.04 won't solve _any_ of those questions about filesystems, mount options, LOG settings or what goes where. All it will do is give you a system that is capable of TRIM at the filesystem level.

    Pop the SSD's in a drawer until you've had some time to figure out the problem you are trying to solve.

  5. #15
    shal is offline Intermediate Member
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    Quote Originally Posted by Brad_C View Post
    Everything I've read about TRIM support suggests that it's not actually a great idea to use the filesystem support for it, but better to run batched TRIM runs on a regular basis.

    Something like a cron job running fstrim would be suitable and would work without you needing to upgrade the kernel.
    I doubt that there is no need to upgrade kernel. It seems no matter how trim runs automatically or manually, kernel must support it.

    How the manually trim will work if there is no such command - 'mark sector ready for use'?

  6. #16
    Brad_C is offline Loyal Member
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    Quote Originally Posted by shal View Post
    How the manually trim will work if there is no such command - 'mark sector ready for use'?
    TRIM is simply a command in the ATA command set. Kernel support for TRIM in this context means the filesystems are aware of and use the TRIM ATA command to free unused space. There is nothing stopping userspace (ie fstrim) from issuing TRIM commands directly to the drive on kernels that don't do this.

    I'd get that bullet wound looked at before you lose a leg.

  7. #17
    shal is offline Intermediate Member
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    Quote Originally Posted by Brad_C View Post
    TRIM is simply a command in the ATA command set. Kernel support for TRIM in this context means the filesystems are aware of and use the TRIM ATA command to free unused space. There is nothing stopping userspace (ie fstrim) from issuing TRIM commands directly to the drive on kernels that don't do this.

    I'd get that bullet wound looked at before you lose a leg.
    Glad to hear that. Could you give me some links about how to install and use fstrim. Somehow I did not find any usable doc.

    I think I must try my SSDs until they are not so ancient.
    thanks in advance. Also I believe that I am not gonna have any problems with wearout because x25 e series is disigned for servers and it is SLC. (not a MLC as most SSDs)

  8. #18
    phoenix is offline Zimbra Consultant & Moderator
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    Quote Originally Posted by shal View Post
    Somehow I did not find any usable doc.
    Really? You do surprise me: +ubuntu +fstrim - Yahoo! Search Results
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  9. #19
    shal is offline Intermediate Member
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    Quote Originally Posted by phoenix View Post
    Really? You do surprise me: +ubuntu +fstrim - Yahoo! Search Results
    Thanks, I used Yandex search engine, I now see it is for Russian web only.

  10. #20
    bmw
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    What Ubuntu 10.04 does not offer is the latest versions of DRBD, Corosync and Pacemaker for creating high-availability and clusters.
    Just getting to 10.10 is a major improvement but just that simple update to 10.04 seems to be painstaking to answer by the developers.
    What is the big deal for us folks (using NE, no less) that are in a crack?

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