similar to: fixing partition alignment ?

Hi, A repository for MooseFS is just born. It provides CentOS 5.5 SRPMS, i386 and x86_64. cd /etc/yum.repos.d/; wget http://centos.kodros.fr/moosefs.repo ; yum install mfs Two points: - DNS may not be up to date where you are. The subdomain has just been created. Please be patient. - I have made an update to the .spec file, to move config files to /etc/mfs instead of /etc. I had no time to test

Hi, NetApp support has suggested us aligning partitions to improve performance, in short: starting sector must be divisible by 8. How can I move the start point in a misaligned partition -in production, with ext3- under Linux? A screenshot with a misaligned (start=63s) and aligned (start=64s) partition is available at: http://filesocial.com/lkwvvn2 (If anyone is interested in this topic,

(Sorry for the duplicate mail, Richard, I accidentally sent a copy only to you before.) On Thu, Jan 14, 2016 at 10:26 PM, Richard Smith via cfe-dev < cfe-dev at lists.llvm.org> wrote: > [1]: That's not completely true, as it's possible to create an object > that is underaligned for its type: > > struct __attribute__((packed)) A { > char k; > struct B { int n;

I've been asked for ideas on building a rather large archival storage system for inhouse use, on the order of 100-400TB. Probably using CentOS 6. The existing system this would replace is using Solaris 10 and ZFS, but I want to explore using Linux instead. We have our own tomcat based archiving software that would run on this storage server, along with NFS client and server. Its a

Hi Joan, On Mon, 13 May 2019 at 18:01, Joan Lluch <joan.lluch at icloud.com> wrote: > After looking at it a bit further, I think this is a Clang thing. Clang issues “align 2” if the struct has at least one int (2 bytes), but also if the entire struct size is multiple of 2. For example a struct with 4 char members. In these cases the LLVM backend correctly creates word sized load/stores

On 05/07/16 19:45, Volker Lendecke wrote: > On Tue, Jul 05, 2016 at 07:21:16PM +0100, Alex Crow wrote: >> I've set up the "DR" side of my cluster to "use mmap = no" and with >> "private dir" removed from the smb.conf. > Why do you set "use mmap = no"? > >> I have the MooseFS guys on the case as well. Should I put them in touch

On 05/07/16 20:49, Alex Crow wrote: > FYI, by "it did, completely" I meant it failed completely. > > Even if the only file we have to have on the cluster FS (which now > seems to be down solely to the ctdb lock file), I'm still worried what > these failures mean: > > 1) does the -rw (without -m) test suggest any problems with the > MooseFS FS I'm

On 05/07/16 21:16, Alex Crow wrote: > > > On 05/07/16 21:00, Rowland penny wrote: >> On 05/07/16 20:49, Alex Crow wrote: >>> FYI, by "it did, completely" I meant it failed completely. >>> >>> Even if the only file we have to have on the cluster FS (which now >>> seems to be down solely to the ctdb lock file), I'm still worried

I have been having some problems with hardware RAID 1 on the motherboard that I am running CentOS 7 on. After a BIOS upgrade of the system, I lost the RAID 1 setup and was no longer able to boot the system. Testdisk revealed that the partition tables had been damaged and because I had earlier saved information from fdisk, I was able to recreate the partitions. However, booting into the BIOS and

Hello, I have a Dell 2950 with a Perc 5/i, two 300GB 15K SAS drives in a RAID0 array. I am considering going to ZFS and I would like to get some feedback about which situation would yield the highest performance: using the Perc 5/i to provide a hardware RAID0 that is presented as a single volume to OpenSolaris, or using the drives separately and creating the RAID0 with OpenSolaris and ZFS? Or

Le mardi 25 avril 2017 ? 10:39 +0200, Robert Moskowitz a ?crit : > Thanks Laurent. You obviously know a LOT more about SELinux than I. I > pretty much just use commands and not build policies. So I need some > more information here. > > From what you provided below, how do I determine what is currently in > place and how do I add your stuff (changing postgresql with

Hi, We've had a strange issue after following the recommendations at https://wiki.samba.org/index.php/Ping_pong, particularly the part about mmap coherence. We are running CTDB/Samba over a MooseFS clustered FS, and we'd not done the ping-pong before. After finding that the mmap coherence test did not pass, we changed "use mmap" to "no" in smb.conf. This morning

Hi, There are several optimizations where we try to load speculatively. There are also two similar functions to determine whether it's a safe transformation: * isSafeToLoadUnconditionally * isSafeToSpeculativelyExecute isSafeToLoadUnconditionally tries to take load alignment into account but fails to do this in some cases. It checks alignment for pointers derived from allocas and global

Le mardi 25 avril 2017 ? 11:19 +0200, Robert Moskowitz a ?crit : > /usr/lib/ld-2.17.so This file is not part of CentOS 7, nor CentOS 6 ? -- Laurent Wandrebeck <l.wandrebeck at quelquesmots.fr>

A customer is looking to replace or augment their Sun Thumper with a ZFS appliance like 7320. However, the Thumper was used not only as a protocol storage server (home dirs, files, backups over NFS/CIFS/Rsync), but also as a general-purpose server with unpredictably-big-data programs running directly on it (such as corporate databases, Alfresco for intellectual document storage, etc.) in order to

On 04/07/16 20:39, Volker Lendecke wrote: > On Mon, Jul 04, 2016 at 04:58:35PM +0100, Alex Crow wrote: >> • Add the following lines to the [global] section of your Samba >> configuration >> clustering = yes >> idmap backend = tdb2 >> private dir = /gluster/lock >> >> Can you confirm that "private dir" does *not* have to be set in smb.conf to

On 03/07/16 13:06, Volker Lendecke wrote: > On Fri, Jul 01, 2016 at 10:00:21AM +0100, Alex Crow wrote: >> We've had a strange issue after following the recommendations at >> https://wiki.samba.org/index.php/Ping_pong, particularly the part >> about mmap coherence. We are running CTDB/Samba over a MooseFS >> clustered FS, and we'd not done the ping-pong before.

Le mardi 25 avril 2017 ? 11:07 +0200, Robert Moskowitz a ?crit : > > On 04/25/2017 10:58 AM, Laurent Wandrebeck wrote: > > Le mardi 25 avril 2017 ? 10:39 +0200, Robert Moskowitz a ?crit : > >> Thanks Laurent. You obviously know a LOT more about SELinux than I. I > >> pretty much just use commands and not build policies. So I need some > >> more

On Thu, Jul 14, 2016 at 02:39:48PM +0100, Alex Crow wrote: > >The main hint I would like to give to the MooseFS developers is to get > >ping_pong -rw working. If you need any assistance in setting that up > >and getting arguments on why this is important, let us know! > > > >With best regards, > > > >Volker > > Any arguments that I can pass on would

Hi, On SPU, variables in the .bss section that are allocated with the .lcomm directive are not aligned on 16 byte boundaries. This causes misaligned loads, as the generated assembly assumes this "default" alignment. A patch to disable .lcomm in favour of '.local .comm' is attached. kalle P.s. As an example, the following function returns '3', when '5' is