search for: gordonmessm

...lete state of the system. http://searchservervirtualization.techtarget.com/tip/Getting-a-clear-picture-on-KVM-snapshot-basics Backups from within the guest will typically be much smaller. I'm working on a flexible snapshot script that supports multiple storage types. https://bitbucket.org/gordonmessmer/dragonsdawn-snapshot

...ng your > own.? Bacula has snapshot support.? Alternately, my project can manage > snapshots and handle freezing / thawing PostgreSQL services.? I think > it's a better option than Bacula's, but either is better than > reinventing this wheel. > > https://bitbucket.org/gordonmessmer/dragonsdawn-snapshot > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos Thank you for the suggestion. I don't know why I considered pg_dump better then filesystem backup. At thi...

Il 17/09/2018 22:12, Gordon Messmer ha scritto: > On 9/17/18 7:50 AM, Alessandro Baggi wrote: >> Running a backup I follow this steps: >> >> 1) Stop httpd >> 2) Create lvm snapshot on the dataset >> 3) Backup database >> 4) restart httpd (to avoid more downtime) >> 5) mount the snapshot and execute backup >> 6) umount and remove the snapshot

...> If you need guaranteed-complete filesystem-level snapshots, you need to be using something at the kernel level that can atomically collect the set of modified blocks/files, rather than something that crawls the tree in user space. Generally, I agree with you. In fact: https://bitbucket.org/gordonmessmer/dragonsdawn-snapshot https://github.com/rsnapshot/rsnapshot/pull/44 Doing block-level differentials is nice, if you're using ZFS. But not everyone wants to run ZFS on Linux. I do think that backing up snapshots is important, though.

Hello , After upgrading the system from CentOS 7.2.1511 to CenOS 7.3.1611 I see that the average processing time has increased from 5-7% to 12-15% (doubled). Not critical but it is not pleasant. Server as KVM with 5 virtual machines. Someone noticed something similar? If so, how to fix that? Thx.

Hello , After upgrading the system from CentOS 7.2.1511 to CenOS 7.3.1611 I see that the average processing time has increased from 5-7% to 12-15% (doubled). Not critical but it is not pleasant. Server as KVM with 5 virtual machines. Someone noticed something similar? If so, how to fix that? Thx.

I have a handful of new systems where I've seen unexpectedly low disk performance on an Avago SAS controller, when using CentOS 7. It looked like a regression, so I installed CentOS 6 on one of them and reloaded CentOS 7 on the other. Immediately after install, a difference is apparent in the RAID rebuild speed. The CentOS 6 system is initializing its software RAID5 array at somewhere

...|--- Status|CLOSED |REOPENED --- Comment #6 from Christoph Anton Mitterer <calestyo at scientia.net> --- Reopening this for now: Could someone of the developers have a look at the most recent comments at: http://tracker.nagios.org/view.php?id=321 gordonmessmer had a look at the issue and may have found the reason. He indicated that the reason is possibly that the forked mux process inherits the stdout/stderr from the invoking ssh process and that causes the troubles. He further wonders, whether ssh's mux process shouldn't close these as a pro...

yep, but still lack critical features :) like livebackup. 2015-06-17 12:26 GMT+03:00 Leon Fauster <leonfauster at googlemail.com>: > Am 17.06.2015 um 11:17 schrieb Eero Volotinen <eero.volotinen at iki.fi>: > > It's so sad that centos is using very old versio on kvm > > and due that fact live backup without downtime is not possible. > > > just some

...ps, > including databases. For example, with MySQL, you can freeze and flush > all the databases, snapshot the LV, and release the freeze. Exactly. And I mention this from time to time... I'm working on infrastructure to make that more common and more consistent: https://bitbucket.org/gordonmessmer/dragonsdawn-snapshot If you're interested in testing or development (or even advocacy), I'd love to have more people contributing. > That also avoids the access-time churn (for backup programs that > don't know O_NOATIME, like any that use rsync). Yes, though rsync based sys...

...system-level snapshots, you >> need to be using something at the kernel level that can >> atomically collect the set of modified blocks/files, rather than >> something that crawls the tree in user space. > > Generally, I agree with you. In fact: > https://bitbucket.org/gordonmessmer/dragonsdawn-snapshot > https://github.com/rsnapshot/rsnapshot/pull/44 > > Doing block-level differentials is nice, if you're using ZFS. But > not everyone wants to run ZFS on Linux. I do think that backing > up snapshots is important, though. > > ____________________...

On 11/05/2016 06:40 AM, Steven Tardy wrote: > What firmware is/are on the cards? In the dmesg output I included: mpt3sas0: LSISAS3008: FWVersion(10.00.00.00), ChipRevision(0x02), BiosVersion(08.25.00.00) > The driver version difference between C6 and C7 could interact badly with old firmware. I suspected that was the case, and tried running elrepo's "kmod-mpt3sas" from

...ced something similar? How is your storage arranged, and what kind of IO patterns do those VMs have? During recent testing, I found that the read performance of software RAID volumes was worse under 7.3 than it was under 7.2. Most other IO had improved significantly: https://plus.google.com/+GordonMessmer/posts/eSe6iNmk1Fs?sfc=false

...of IO patterns do those VMs > have? Do not quite understand. What do you mean? > During recent testing, I found that the read performance of software > RAID volumes was worse under 7.3 than it was under 7.2. Most other IO > had improved significantly: > https://plus.google.com/+GordonMessmer/posts/eSe6iNmk1Fs?sfc=false

...manually, so that I can replace drives using a shell script. Making the partitions predictable means there's less of a chance that I'll make errors during drive replacement, and that I can pass that duty on to less experienced co-workers without worrying about it. https://bitbucket.org/gordonmessmer/kickstart/src

On 29/01/17 18:02, Gordon Messmer wrote: > On 01/28/2017 04:03 PM, TE Dukes wrote: >> What is the preferred remote mail client for 7.3? > > > I'm a fan of SOGo. > never heard of it - looks interesting BUT the production versions are only available with a support contract the begins at $US 750 / annum - how dangerous is the nightly build? - I normally wouldn't dream

...made process rather than rolling your own.? Bacula has snapshot support.? Alternately, my project can manage snapshots and handle freezing / thawing PostgreSQL services.? I think it's a better option than Bacula's, but either is better than reinventing this wheel. https://bitbucket.org/gordonmessmer/dragonsdawn-snapshot

...nd from my point of view, that is a very easy "yes". I understand that it's confusing, but CentOS was never a substitute for RHEL, and never provided the benefits of RHEL's model.? It is not the "free RHEL" that many users tend to think it was: https://fosstodon.org/@gordonmessmer/110648143030974242 https://www.youtube.com/watch?v=tf_EkU3x2G0 ... and conversely, CentOS Stream is a much better stable LTS for self-supported systems than you might believe: https://medium.com/@gordon.messmer/in-favor-of-centos-stream-e5a8a43bdcf8 > 5. Red Hat's policy change contr...

Hi, folks, I'm building a new box, and I want three partitions - /boot, /, and swap, on *one* RAID 1, not three separate partitions. Other than <alt-f2> mdadm..., *is* there any way in the graphical installer to do this? All I see is a way to make three separate partitions. Pointers to links happily accepted. mark, back to googling

...rt.? Alternately, my project can > > manage? > > snapshots and handle freezing / thawing PostgreSQL services.? I > > think? > > it's a better option than Bacula's, but either is better than? > > reinventing this wheel. > > > > https://bitbucket.org/gordonmessmer/dragonsdawn-snapshot > > > > _______________________________________________ > > CentOS mailing list > > CentOS at centos.org > > https://lists.centos.org/mailman/listinfo/centos > > Thank you for the suggestion. > > I don't know why I considered p...