Re: [e-users] Crash on e5

2013-12-09 Thread Alan McKinnon
On 09/12/2013 08:40, Nex6 wrote:
 * Carsten Haitzler ras...@rasterman.com [2013-12-08 21:42:25 +0900]:
 
 On Sun, 8 Dec 2013 10:25:04 + Mick michaelkintz...@gmail.com said:

 On Sunday 08 Dec 2013 01:48:18 Steven@e wrote:
 Hello beber, just for information, you dont need FUSE anymore to use
 ZFS.  zfsonlinux solves this.

 Thanks for the info, but why should we need this ? I see no valid
 reason.

 There are out-of-tree Linux kernel modules care of ZFSOnLinux Project[1].  
 Therefore using ZFS-Fuse is not necessary (or recommended).  At least one 
 valid reason for using ZFS (there are many) is that it guards against fs 
 corruption by using CRC checksums.

 I understand that both Oracle (RHL) Linux and SUSE consider BTRFS 
 production 
 ready and Oracle will be/are using this instead of ZFS.  From my limited 
 understanding BTRFS is being developed at speed and catching up with ZFS, 
 but 
 it does not have the amount of testing that ZFS had to date to vouch for 
 its 
 stability/maturity.  At this stage in their development ZFS is superior to 
 BTRFS in terms of functionality, although there is hope that BTRFS will 
 develop at speed.

 and why? ext4 HAS been production ready for YEARS... inf act not production
 ready... it has been *IN8 production for years... if there is a fs i would
 trust - it's ext4. not zfs and DEFINITELY not btrfs. ext4 (and 3 etc. before
 it) have many more miles of PRODUCTION behind them.

 what this probably was ... was an unstable bleeding-edge kernel since the
 servers are being run on gentoo and thus are not exactly being conservative. 
 it
 was probably a newly introduced bug that hasn't been hammered out and other
 fs's used less will have such bugs many times MORE than ext4 will.
 
 I am going to chime in and give my 2 cents. for filesystems, on production
 servers I tell our ops guys only use ext4 or xfs thats it. 


Gentoo on critical production server that face the public without a
proper QA staging setup? Good lord, that's a scary thought. I banned
gentoo from production around here.

Lest anyone think I'm a gentoo-hater, my personal workstation:


$ uname -a
Linux khamul 3.12.3-gentoo #1 SMP PREEMPT Sun Dec 8 00:13:02 SAST 2013
 ^

-- 
Alan McKinnon
alan.mckin...@gmail.com


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Re: [e-users] Crash on e5

2013-12-09 Thread David Seikel
On Mon, 09 Dec 2013 10:01:14 +0200 Alan McKinnon
alan.mckin...@gmail.com wrote:

 On 09/12/2013 08:40, Nex6 wrote:
  * Carsten Haitzler ras...@rasterman.com [2013-12-08 21:42:25
  +0900]:
  
  On Sun, 8 Dec 2013 10:25:04 + Mick michaelkintz...@gmail.com
  said:
 
  On Sunday 08 Dec 2013 01:48:18 Steven@e wrote:
  Hello beber, just for information, you dont need FUSE anymore
  to use ZFS.  zfsonlinux solves this.
 
  Thanks for the info, but why should we need this ? I see no
  valid reason.
 
  There are out-of-tree Linux kernel modules care of ZFSOnLinux
  Project[1]. Therefore using ZFS-Fuse is not necessary (or
  recommended).  At least one valid reason for using ZFS (there are
  many) is that it guards against fs corruption by using CRC
  checksums.
 
  I understand that both Oracle (RHL) Linux and SUSE consider BTRFS
  production ready and Oracle will be/are using this instead of
  ZFS.  From my limited understanding BTRFS is being developed at
  speed and catching up with ZFS, but it does not have the amount
  of testing that ZFS had to date to vouch for its
  stability/maturity.  At this stage in their development ZFS is
  superior to BTRFS in terms of functionality, although there is
  hope that BTRFS will develop at speed.
 
  and why? ext4 HAS been production ready for YEARS... inf act not
  production ready... it has been *IN8 production for years... if
  there is a fs i would trust - it's ext4. not zfs and DEFINITELY
  not btrfs. ext4 (and 3 etc. before it) have many more miles of
  PRODUCTION behind them.
 
  what this probably was ... was an unstable bleeding-edge kernel
  since the servers are being run on gentoo and thus are not exactly
  being conservative. it was probably a newly introduced bug that
  hasn't been hammered out and other fs's used less will have such
  bugs many times MORE than ext4 will.
  
  I am going to chime in and give my 2 cents. for filesystems, on
  production servers I tell our ops guys only use ext4 or xfs thats
  it. 
 
 
 Gentoo on critical production server that face the public without a
 proper QA staging setup? Good lord, that's a scary thought. I banned
 gentoo from production around here.
 
 Lest anyone think I'm a gentoo-hater, my personal workstation:
 
 
 $ uname -a
 Linux khamul 3.12.3-gentoo #1 SMP PREEMPT Sun Dec 8 00:13:02 SAST 2013
  ^

Meh we all have our different beliefs about such things.  I personally
use BTRFS at home, and switched from ZFS to BTRFS on a production
server for a client.  This thread can devolve into a my distro / FS is
better than yours war, or we can just let the person that volunteered
to do the work do it the way he's most comfortable with.

-- 
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coz there are too many silver coated monkeys in the world.

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Re: [e-users] Crash on e5

2013-12-08 Thread Guillaume Friloux
On 07/12/2013 22:16, Bertrand Jacquin wrote:
 On 2013-12-07 22:09, Guillaume Friloux wrote:
 On 07/12/2013 21:05, Bertrand Jacquin wrote:
 Moving to other FS is not an option. BTRFS that format is not yet
 completed/fully defined, has elementary fsck when not giving needed
 features. ZFS using FUSE is not going to happened on that critical
 host.

 Kernel was a 3.7 and have been updated to longterm-stable 3.10 kernel.
 There are been a lot of fixes on EXT and VFS between 3.7 and 3.10. We
 stick on longterm kernel on all hosts, that one was the last not using
 a
 longterm stable.

 Hello beber, just for information, you dont need FUSE anymore to use
 ZFS.
 zfsonlinux solves this.
 Thanks for the info, but why should we need this ? I see no valid
 reason.
I dont say we need it. It was only for information.

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Re: [e-users] Crash on e5

2013-12-08 Thread Mick
On Sunday 08 Dec 2013 01:48:18 Steven@e wrote:
  Hello beber, just for information, you dont need FUSE anymore to use
  ZFS.  zfsonlinux solves this.
  
  Thanks for the info, but why should we need this ? I see no valid
  reason.

There are out-of-tree Linux kernel modules care of ZFSOnLinux Project[1].  
Therefore using ZFS-Fuse is not necessary (or recommended).  At least one 
valid reason for using ZFS (there are many) is that it guards against fs 
corruption by using CRC checksums.

I understand that both Oracle (RHL) Linux and SUSE consider BTRFS production 
ready and Oracle will be/are using this instead of ZFS.  From my limited 
understanding BTRFS is being developed at speed and catching up with ZFS, but 
it does not have the amount of testing that ZFS had to date to vouch for its 
stability/maturity.  At this stage in their development ZFS is superior to 
BTRFS in terms of functionality, although there is hope that BTRFS will 
develop at speed.

[1] http://zfsonlinux.org/
-- 
Regards,
Mick
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Re: [e-users] Crash on e5

2013-12-08 Thread The Rasterman
On Sun, 8 Dec 2013 10:25:04 + Mick michaelkintz...@gmail.com said:

 On Sunday 08 Dec 2013 01:48:18 Steven@e wrote:
   Hello beber, just for information, you dont need FUSE anymore to use
   ZFS.  zfsonlinux solves this.
   
   Thanks for the info, but why should we need this ? I see no valid
   reason.
 
 There are out-of-tree Linux kernel modules care of ZFSOnLinux Project[1].  
 Therefore using ZFS-Fuse is not necessary (or recommended).  At least one 
 valid reason for using ZFS (there are many) is that it guards against fs 
 corruption by using CRC checksums.
 
 I understand that both Oracle (RHL) Linux and SUSE consider BTRFS production 
 ready and Oracle will be/are using this instead of ZFS.  From my limited 
 understanding BTRFS is being developed at speed and catching up with ZFS, but 
 it does not have the amount of testing that ZFS had to date to vouch for its 
 stability/maturity.  At this stage in their development ZFS is superior to 
 BTRFS in terms of functionality, although there is hope that BTRFS will 
 develop at speed.

and why? ext4 HAS been production ready for YEARS... inf act not production
ready... it has been *IN8 production for years... if there is a fs i would
trust - it's ext4. not zfs and DEFINITELY not btrfs. ext4 (and 3 etc. before
it) have many more miles of PRODUCTION behind them.

what this probably was ... was an unstable bleeding-edge kernel since the
servers are being run on gentoo and thus are not exactly being conservative. it
was probably a newly introduced bug that hasn't been hammered out and other
fs's used less will have such bugs many times MORE than ext4 will.


-- 
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The Rasterman (Carsten Haitzler)ras...@rasterman.com


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Re: [e-users] Crash on e5

2013-12-08 Thread Christopher Barry
On Sun, 8 Dec 2013 21:42:25 +0900
Carsten Haitzler (The Rasterman) ras...@rasterman.com wrote:

 On Sun, 8 Dec 2013 10:25:04 + Mick michaelkintz...@gmail.com
 said:
 
  On Sunday 08 Dec 2013 01:48:18 Steven@e wrote:
Hello beber, just for information, you dont need FUSE anymore
to use ZFS.  zfsonlinux solves this.

Thanks for the info, but why should we need this ? I see no
valid reason.
  
  There are out-of-tree Linux kernel modules care of ZFSOnLinux
  Project[1]. Therefore using ZFS-Fuse is not necessary (or
  recommended).  At least one valid reason for using ZFS (there are
  many) is that it guards against fs corruption by using CRC
  checksums.
  
  I understand that both Oracle (RHL) Linux and SUSE consider BTRFS
  production ready and Oracle will be/are using this instead of ZFS.
  From my limited understanding BTRFS is being developed at speed and
  catching up with ZFS, but it does not have the amount of testing
  that ZFS had to date to vouch for its stability/maturity.  At this
  stage in their development ZFS is superior to BTRFS in terms of
  functionality, although there is hope that BTRFS will develop at
  speed.
 
 and why? ext4 HAS been production ready for YEARS... inf act not
 production ready... it has been *IN8 production for years... if there
 is a fs i would trust - it's ext4. not zfs and DEFINITELY not btrfs.
 ext4 (and 3 etc. before it) have many more miles of PRODUCTION behind
 them.

Absolutely. The other filesystems are amazing in their feature sets,
but are not viable production filesystems quite yet in my opinion.

 
 what this probably was ... was an unstable bleeding-edge kernel since
 the servers are being run on gentoo and thus are not exactly being
 conservative. it was probably a newly introduced bug that hasn't been
 hammered out and other fs's used less will have such bugs many times
 MORE than ext4 will.
 
 

Gentoo is a great desktop distro, but definitely not a server OS (may
cause a flame war here, but sorry...). For me, and I've been a sysadmin
since Debian first came out (yes, that long), and I've used literally
all distros at one time or another. Debian stable (or even testing) is
an ideal server OS you can absolutely rely on. I would not use anything
else. If you absolutely must use gentoo for some feature only it
provides, then only use it in the VM - definitely NOT on the host. The
host must be rock solid.

But, if rebuilding the setup is on the radar in light of this wake up
call, the filesystem argument is totally moot - just use LVM for the
images. It's the correct thing to do for a production VM host.


-- 
Regards,
Christopher Barry

Random geeky fortune:
One does not thank logic.
-- Sarek, Journey to Babel, stardate 3842.4

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Re: [e-users] Crash on e5

2013-12-08 Thread The Rasterman
On Sun, 8 Dec 2013 12:17:53 -0500 Christopher Barry
christopher.r.ba...@gmail.com said:

 On Sun, 8 Dec 2013 21:42:25 +0900
 Carsten Haitzler (The Rasterman) ras...@rasterman.com wrote:
 
  On Sun, 8 Dec 2013 10:25:04 + Mick michaelkintz...@gmail.com
  said:
  
   On Sunday 08 Dec 2013 01:48:18 Steven@e wrote:
 Hello beber, just for information, you dont need FUSE anymore
 to use ZFS.  zfsonlinux solves this.
 
 Thanks for the info, but why should we need this ? I see no
 valid reason.
   
   There are out-of-tree Linux kernel modules care of ZFSOnLinux
   Project[1]. Therefore using ZFS-Fuse is not necessary (or
   recommended).  At least one valid reason for using ZFS (there are
   many) is that it guards against fs corruption by using CRC
   checksums.
   
   I understand that both Oracle (RHL) Linux and SUSE consider BTRFS
   production ready and Oracle will be/are using this instead of ZFS.
   From my limited understanding BTRFS is being developed at speed and
   catching up with ZFS, but it does not have the amount of testing
   that ZFS had to date to vouch for its stability/maturity.  At this
   stage in their development ZFS is superior to BTRFS in terms of
   functionality, although there is hope that BTRFS will develop at
   speed.
  
  and why? ext4 HAS been production ready for YEARS... inf act not
  production ready... it has been *IN8 production for years... if there
  is a fs i would trust - it's ext4. not zfs and DEFINITELY not btrfs.
  ext4 (and 3 etc. before it) have many more miles of PRODUCTION behind
  them.
 
 Absolutely. The other filesystems are amazing in their feature sets,
 but are not viable production filesystems quite yet in my opinion.
 
  
  what this probably was ... was an unstable bleeding-edge kernel since
  the servers are being run on gentoo and thus are not exactly being
  conservative. it was probably a newly introduced bug that hasn't been
  hammered out and other fs's used less will have such bugs many times
  MORE than ext4 will.
  
  
 
 Gentoo is a great desktop distro, but definitely not a server OS (may
 cause a flame war here, but sorry...). For me, and I've been a sysadmin
 since Debian first came out (yes, that long), and I've used literally
 all distros at one time or another. Debian stable (or even testing) is
 an ideal server OS you can absolutely rely on. I would not use anything
 else. If you absolutely must use gentoo for some feature only it
 provides, then only use it in the VM - definitely NOT on the host. The
 host must be rock solid.
 
 But, if rebuilding the setup is on the radar in light of this wake up
 call, the filesystem argument is totally moot - just use LVM for the
 images. It's the correct thing to do for a production VM host.

well beber (our admin who volunteers his time to the server and its vms) wants
gentoo.


-- 
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The Rasterman (Carsten Haitzler)ras...@rasterman.com


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Re: [e-users] Crash on e5

2013-12-08 Thread Bertrand Jacquin
On 2013-12-09 01:52, Carsten Haitzler wrote:
 On Sun, 8 Dec 2013 12:17:53 -0500 Christopher Barry
 christopher.r.ba...@gmail.com said:
 
 On Sun, 8 Dec 2013 21:42:25 +0900
 Carsten Haitzler (The Rasterman) ras...@rasterman.com wrote:
 
  On Sun, 8 Dec 2013 10:25:04 + Mick michaelkintz...@gmail.com
  said:
 
   On Sunday 08 Dec 2013 01:48:18 Steven@e wrote:
 Hello beber, just for information, you dont need FUSE anymore
 to use ZFS.  zfsonlinux solves this.

 Thanks for the info, but why should we need this ? I see no
 valid reason.
  
   There are out-of-tree Linux kernel modules care of ZFSOnLinux
   Project[1]. Therefore using ZFS-Fuse is not necessary (or
   recommended).  At least one valid reason for using ZFS (there are
   many) is that it guards against fs corruption by using CRC
   checksums.
  
   I understand that both Oracle (RHL) Linux and SUSE consider BTRFS
   production ready and Oracle will be/are using this instead of ZFS.
   From my limited understanding BTRFS is being developed at speed and
   catching up with ZFS, but it does not have the amount of testing
   that ZFS had to date to vouch for its stability/maturity.  At this
   stage in their development ZFS is superior to BTRFS in terms of
   functionality, although there is hope that BTRFS will develop at
   speed.
 
  and why? ext4 HAS been production ready for YEARS... inf act not
  production ready... it has been *IN8 production for years... if there
  is a fs i would trust - it's ext4. not zfs and DEFINITELY not btrfs.
  ext4 (and 3 etc. before it) have many more miles of PRODUCTION behind
  them.
 
 Absolutely. The other filesystems are amazing in their feature sets,
 but are not viable production filesystems quite yet in my opinion.
 
 
  what this probably was ... was an unstable bleeding-edge kernel since
  the servers are being run on gentoo and thus are not exactly being
  conservative. it was probably a newly introduced bug that hasn't been
  hammered out and other fs's used less will have such bugs many times
  MORE than ext4 will.
 
 
 
 Gentoo is a great desktop distro, but definitely not a server OS (may
 cause a flame war here, but sorry...). For me, and I've been a 
 sysadmin
 since Debian first came out (yes, that long), and I've used literally
 all distros at one time or another. Debian stable (or even testing) is
 an ideal server OS you can absolutely rely on. I would not use 
 anything
 else. If you absolutely must use gentoo for some feature only it
 provides, then only use it in the VM - definitely NOT on the host. The
 host must be rock solid.
 
 But, if rebuilding the setup is on the radar in light of this wake up
 call, the filesystem argument is totally moot - just use LVM for the
 images. It's the correct thing to do for a production VM host.
 
 well beber (our admin who volunteers his time to the server and its 
 vms) wants
 gentoo.

Yep :) And opposed to Christopher, I don't find gentoo is great for a 
desktop but for servers.
The main reason is flexibility and that it's easier to manage, but as 
Chris said, this is flamewar topic, I could write a book on why people 
should not use Debian on servers.

We have a builder host, so configuration, packages etc are shared across 
all servers and no compilation is done on production hosts (without 
that, I have to say that it's a real pain in ass to maintain, but not 
the case)

About FS, raster speech agreed .


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Re: [e-users] Crash on e5

2013-12-08 Thread Nex6
* Carsten Haitzler ras...@rasterman.com [2013-12-08 21:42:25 +0900]:

 On Sun, 8 Dec 2013 10:25:04 + Mick michaelkintz...@gmail.com said:
 
  On Sunday 08 Dec 2013 01:48:18 Steven@e wrote:
Hello beber, just for information, you dont need FUSE anymore to use
ZFS.  zfsonlinux solves this.

Thanks for the info, but why should we need this ? I see no valid
reason.
  
  There are out-of-tree Linux kernel modules care of ZFSOnLinux Project[1].  
  Therefore using ZFS-Fuse is not necessary (or recommended).  At least one 
  valid reason for using ZFS (there are many) is that it guards against fs 
  corruption by using CRC checksums.
  
  I understand that both Oracle (RHL) Linux and SUSE consider BTRFS 
  production 
  ready and Oracle will be/are using this instead of ZFS.  From my limited 
  understanding BTRFS is being developed at speed and catching up with ZFS, 
  but 
  it does not have the amount of testing that ZFS had to date to vouch for 
  its 
  stability/maturity.  At this stage in their development ZFS is superior to 
  BTRFS in terms of functionality, although there is hope that BTRFS will 
  develop at speed.
 
 and why? ext4 HAS been production ready for YEARS... inf act not production
 ready... it has been *IN8 production for years... if there is a fs i would
 trust - it's ext4. not zfs and DEFINITELY not btrfs. ext4 (and 3 etc. before
 it) have many more miles of PRODUCTION behind them.
 
 what this probably was ... was an unstable bleeding-edge kernel since the
 servers are being run on gentoo and thus are not exactly being conservative. 
 it
 was probably a newly introduced bug that hasn't been hammered out and other
 fs's used less will have such bugs many times MORE than ext4 will.

I am going to chime in and give my 2 cents. for filesystems, on production
servers I tell our ops guys only use ext4 or xfs thats it. 

Nex6


 
 
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Re: [e-users] Crash on e5

2013-12-08 Thread Nex6
* Bertrand Jacquin be...@meleeweb.net [2013-12-09 02:41:18 +0100]:

 On 2013-12-09 01:52, Carsten Haitzler wrote:
  On Sun, 8 Dec 2013 12:17:53 -0500 Christopher Barry
  christopher.r.ba...@gmail.com said:
  
  On Sun, 8 Dec 2013 21:42:25 +0900
  Carsten Haitzler (The Rasterman) ras...@rasterman.com wrote:
  
   On Sun, 8 Dec 2013 10:25:04 + Mick michaelkintz...@gmail.com
   said:
  On Sunday 08 Dec 2013 01:48:18 Steven@e wrote:
  Hello beber, just for information, you dont need FUSE anymore
   to use ZFS.  zfsonlinux solves this.
 
  Thanks for the info, but why should we need this ? I see no
  valid reason.
   
There are out-of-tree Linux kernel modules care of ZFSOnLinux
Project[1]. Therefore using ZFS-Fuse is not necessary (or
recommended).  At least one valid reason for using ZFS (there are
many) is that it guards against fs corruption by using CRC
checksums.
   
I understand that both Oracle (RHL) Linux and SUSE consider BTRFS
production ready and Oracle will be/are using this instead of ZFS.
From my limited understanding BTRFS is being developed at speed and
catching up with ZFS, but it does not have the amount of testing
that ZFS had to date to vouch for its stability/maturity.  At this
stage in their development ZFS is superior to BTRFS in terms of
functionality, although there is hope that BTRFS will develop at
speed.
  
   and why? ext4 HAS been production ready for YEARS... inf act not
   production ready... it has been *IN8 production for years... if there
   is a fs i would trust - it's ext4. not zfs and DEFINITELY not btrfs.
   ext4 (and 3 etc. before it) have many more miles of PRODUCTION behind
   them.
  
  Absolutely. The other filesystems are amazing in their feature sets,
  but are not viable production filesystems quite yet in my opinion.
  
  
   what this probably was ... was an unstable bleeding-edge kernel since
   the servers are being run on gentoo and thus are not exactly being
   conservative. it was probably a newly introduced bug that hasn't been
   hammered out and other fs's used less will have such bugs many times
   MORE than ext4 will.
  
  
  
  Gentoo is a great desktop distro, but definitely not a server OS (may
  cause a flame war here, but sorry...). For me, and I've been a 
  sysadmin
  since Debian first came out (yes, that long), and I've used literally
  all distros at one time or another. Debian stable (or even testing) is
  an ideal server OS you can absolutely rely on. I would not use 
  anything
  else. If you absolutely must use gentoo for some feature only it
  provides, then only use it in the VM - definitely NOT on the host. The
  host must be rock solid.
  
  But, if rebuilding the setup is on the radar in light of this wake up
  call, the filesystem argument is totally moot - just use LVM for the
  images. It's the correct thing to do for a production VM host.
  
  well beber (our admin who volunteers his time to the server and its 
  vms) wants
  gentoo.
 
 Yep :) And opposed to Christopher, I don't find gentoo is great for a 
 desktop but for servers.
 The main reason is flexibility and that it's easier to manage, but as 
 Chris said, this is flamewar topic, I could write a book on why people 
 should not use Debian on servers.
 
 We have a builder host, so configuration, packages etc are shared across 
 all servers and no compilation is done on production hosts (without 
 that, I have to say that it's a real pain in ass to maintain, but not 
 the case)
 
 About FS, raster speech agreed .

while I love using debian for servers or desktops i think using the distro
your most familer with is best.



 
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[e-users] Crash on e5

2013-12-07 Thread Bertrand Jacquin
Hi,

This morning e5 have been unavailable for 2 hours and 30 minutes starting
at about 10:40 UTC.

All is back again, but if you have strange behaviour, please reply (and
CC: me). Thanks to thoses who already did.

The EXT4 filesystem that host the VMs used for Enlightenment internal and
public purposes are stored on a RADI10 partition that protect us against
a disc failure but not against a filesystem corruption what happened to
us. I don't known exactly the source of that corruption but in any case
it took some time to fsck, and verify data integrity.

Corrupted file system:
 - e5: /data - VMs storage
   Everything OK after a long fsck

 - mail1: /srv/mail - mail storage
   Missing subscribers on git list, e-b0rk list entirely corrupted
   Backup restored in date of 06/12/2013

 - web1: /srv/mysql - MySQL storage
   Databases corrupted, binlog corrupted, complete FS corrupted
   Restored a version of mid 2013, backup are missing. I need to fix my
   backup configuration on this. The only use and so lost database is
   the one used by exchange.enlightenment.org what lead to addition made
   since mid 2013 are lost.

 - build-gentoo-cross1: /srv/build - compile storage
   Corrupted source and compiled file
   Not restored as not backuped, can be regenerated, all history is present
   on jenkins-master1

All VMs FS have been checked, as I say everything should be OK, but
report any abnormal things.

A chance we have outsourced backup.

-- 
Beber

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Re: [e-users] Crash on e5

2013-12-07 Thread David Seikel
On Sat, 7 Dec 2013 17:41:36 +0100 Bertrand Jacquin be...@meleeweb.net
wrote:

Missing subscribers on git list, e-b0rk list entirely corrupted

e-b0rk got borked, think that was just asking for trouble.  B-)

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Re: [e-users] Crash on e5

2013-12-07 Thread Mick
On Saturday 07 Dec 2013 17:22:06 David Seikel wrote:
 On Sat, 7 Dec 2013 17:41:36 +0100 Bertrand Jacquin be...@meleeweb.net
 
 wrote:
 Missing subscribers on git list, e-b0rk list entirely corrupted
 
 e-b0rk got borked, think that was just asking for trouble.  B-)

Perhaps time to move to ZFS?

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Re: [e-users] Crash on e5

2013-12-07 Thread David Seikel
On Sat, 7 Dec 2013 18:11:16 + Mick michaelkintz...@gmail.com
wrote:

 On Saturday 07 Dec 2013 17:22:06 David Seikel wrote:
  On Sat, 7 Dec 2013 17:41:36 +0100 Bertrand Jacquin
  be...@meleeweb.net
  
  wrote:
  Missing subscribers on git list, e-b0rk list entirely corrupted
  
  e-b0rk got borked, think that was just asking for trouble.  B-)
 
 Perhaps time to move to ZFS?

Or BTRFS?

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Re: [e-users] Crash on e5

2013-12-07 Thread Christopher Barry
On Sun, 8 Dec 2013 04:20:37 +1000
David Seikel onef...@gmail.com wrote:

 On Sat, 7 Dec 2013 18:11:16 + Mick michaelkintz...@gmail.com
 wrote:
 
  On Saturday 07 Dec 2013 17:22:06 David Seikel wrote:
   On Sat, 7 Dec 2013 17:41:36 +0100 Bertrand Jacquin
   be...@meleeweb.net
   
   wrote:
   Missing subscribers on git list, e-b0rk list entirely
corrupted
   
   e-b0rk got borked, think that was just asking for trouble.  B-)
  
  Perhaps time to move to ZFS?
 
 Or BTRFS?
 

Regardless of filesystem type, determining the cause of the corruption
should be attempted and corrected first if possible. Could multiple
VMs somehow be writing to the same data in the main FS simultaneously
per chance? (just a thought, as this is often a cause of corruption
in non-clustered filesystems, but I do not fully understand your config)

Also, running the VMs as disk files in a filesystem should really be
avoided if at all possible. In my experience, it's better to use logical
volumes directly for VM images for performance, scalability, and
generally less layers of stuff to fail in the IO path.

And of course, a simple nightly rsync of stuff that matters should be
setup... but you know that quite well now :(

I've had very good experiences with this:
https://github.com/DrHyde/rsnapshot

It's simple, and versions the backups with excellent space, time and
bandwidth utilization so you can roll back to configurable points in
time easily, without consuming a bunch of space unnecessarily.

-- 
Regards,
Christopher Barry

Random geeky fortune:
Dump the condiments.  If we are to be eaten, we don't need to taste
good. -- Visionaries cartoon

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Re: [e-users] Crash on e5

2013-12-07 Thread Bertrand Jacquin
On 2013-12-07 20:30, Christopher Barry wrote:
 On Sun, 8 Dec 2013 04:20:37 +1000
 David Seikel onef...@gmail.com wrote:
 
 On Sat, 7 Dec 2013 18:11:16 + Mick michaelkintz...@gmail.com
 wrote:
 
  On Saturday 07 Dec 2013 17:22:06 David Seikel wrote:
   On Sat, 7 Dec 2013 17:41:36 +0100 Bertrand Jacquin
   be...@meleeweb.net
  
   wrote:
   Missing subscribers on git list, e-b0rk list entirely
corrupted
  
   e-b0rk got borked, think that was just asking for trouble.  B-)
 
  Perhaps time to move to ZFS?
 
 Or BTRFS?

Moving to other FS is not an option. BTRFS that format is not yet 
completed/fully defined, has elementary fsck when not giving needed 
features. ZFS using FUSE is not going to happened on that critical host.

Kernel was a 3.7 and have been updated to longterm-stable 3.10 kernel. 
There are been a lot of fixes on EXT and VFS between 3.7 and 3.10. We 
stick on longterm kernel on all hosts, that one was the last not using a 
longterm stable.

 Regardless of filesystem type, determining the cause of the corruption
 should be attempted and corrected first if possible. Could multiple
 VMs somehow be writing to the same data in the main FS simultaneously
 per chance? (just a thought, as this is often a cause of corruption
 in non-clustered filesystems, but I do not fully understand your 
 config)

Nop :)

 Also, running the VMs as disk files in a filesystem should really be
 avoided if at all possible. In my experience, it's better to use 
 logical
 volumes directly for VM images for performance, scalability, and
 generally less layers of stuff to fail in the IO path.

In my experience too and it was designed like this at the beginning 
before moving to qcow2 files argued by others people that it make easier 
administration, which what I still don't agree and add another layer of 
abstraction (with more cache, and sync issues).

 And of course, a simple nightly rsync of stuff that matters should be
 setup... but you know that quite well now :(

That's what is done using other tools than rsnapshot.

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Re: [e-users] Crash on e5

2013-12-07 Thread Guillaume Friloux
On 07/12/2013 21:05, Bertrand Jacquin wrote:

 Moving to other FS is not an option. BTRFS that format is not yet
 completed/fully defined, has elementary fsck when not giving needed
 features. ZFS using FUSE is not going to happened on that critical host.

 Kernel was a 3.7 and have been updated to longterm-stable 3.10 kernel.
 There are been a lot of fixes on EXT and VFS between 3.7 and 3.10. We
 stick on longterm kernel on all hosts, that one was the last not using a
 longterm stable.

Hello beber, just for information, you dont need FUSE anymore to use ZFS.
zfsonlinux solves this.

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Re: [e-users] Crash on e5

2013-12-07 Thread Bertrand Jacquin
On 2013-12-07 22:09, Guillaume Friloux wrote:
 On 07/12/2013 21:05, Bertrand Jacquin wrote:
 
 Moving to other FS is not an option. BTRFS that format is not yet
 completed/fully defined, has elementary fsck when not giving needed
 features. ZFS using FUSE is not going to happened on that critical 
 host.
 
 Kernel was a 3.7 and have been updated to longterm-stable 3.10 kernel.
 There are been a lot of fixes on EXT and VFS between 3.7 and 3.10. We
 stick on longterm kernel on all hosts, that one was the last not using 
 a
 longterm stable.
 
 Hello beber, just for information, you dont need FUSE anymore to use 
 ZFS.
 zfsonlinux solves this.

Thanks for the info, but why should we need this ? I see no valid 
reason.

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Re: [e-users] Crash on e5

2013-12-07 Thread Steven@e
ZFS on linux is clearly not stable yet. not an option.

On Sat, Dec 7, 2013 at 10:16 PM, Bertrand Jacquin be...@meleeweb.net wrote:
 On 2013-12-07 22:09, Guillaume Friloux wrote:
 On 07/12/2013 21:05, Bertrand Jacquin wrote:

 Moving to other FS is not an option. BTRFS that format is not yet
 completed/fully defined, has elementary fsck when not giving needed
 features. ZFS using FUSE is not going to happened on that critical
 host.

 Kernel was a 3.7 and have been updated to longterm-stable 3.10 kernel.
 There are been a lot of fixes on EXT and VFS between 3.7 and 3.10. We
 stick on longterm kernel on all hosts, that one was the last not using
 a
 longterm stable.

 Hello beber, just for information, you dont need FUSE anymore to use
 ZFS.
 zfsonlinux solves this.

 Thanks for the info, but why should we need this ? I see no valid
 reason.

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