Re: Filesystem for backup system

2016-10-16 Thread Roberto Ragusa
On 10/10/2016 05:25 PM, Alex wrote: > Hi, > > I've built an 11TB RAID5 array using fedora23 (soon to be fedora24) to > be used for backup for a bunch of mail and web servers, and thought > I'd inquire about the best filesystem to use. > > I suppose I'm most familiar with ext4, although I

Re: Filesystem for backup system

2016-10-16 Thread Gordon Messmer
On 10/16/2016 05:42 AM, George N. White III wrote: I don't remember the date, specifically, and it's not clear what the circumstances are. One of the consequences of on-line fs checking is that errors tend to be detected long after they actually occur. Not sure what you mean

Re: Filesystem for backup system

2016-10-16 Thread George N. White III
On Sat, Oct 15, 2016 at 6:25 PM, Gordon Messmer wrote: > On 10/13/2016 11:49 PM, c...@zip.com.au wrote: > >> Out of interest, how recent was your need to recover XFS, and what were >> the circumstances that caused it to be necessary? >> > > > I don't remember the date,

Re: Filesystem for backup system

2016-10-15 Thread Gordon Messmer
On 10/13/2016 11:49 PM, c...@zip.com.au wrote: Out of interest, how recent was your need to recover XFS, and what were the circumstances that caused it to be necessary? I don't remember the date, specifically, and it's not clear what the circumstances are. One of the consequences of

Re: Filesystem for backup system

2016-10-14 Thread cs
On 13Oct2016 14:29, Gordon Messmer wrote: On 10/12/2016 03:57 PM, c...@zip.com.au wrote: Except it the wildest scenarios, XFS fsks at mount, almost immediately. Is that different from fsck.ext4 replaying the journal? Not fundamentally. Go and cat (yes, cat) the

Re: Filesystem for backup system

2016-10-13 Thread Gordon Messmer
On 10/12/2016 03:57 PM, c...@zip.com.au wrote: Except it the wildest scenarios, XFS fsks at mount, almost immediately. Is that different from fsck.ext4 replaying the journal? Go and cat (yes, cat) the fsck.xfs command. OK. I'm not sure what you think I'll learn by doing so. fsck.xfs

RE: Filesystem for backup system

2016-10-13 Thread J.Witvliet
-Original Message- From: c...@zip.com.au [mailto:c...@zip.com.au] Sent: donderdag 13 oktober 2016 0:58 To: Community support for Fedora users Subject: Re: Filesystem for backup system On 12Oct2016 09:40, Mike Wright <nob...@nospam.hostisimo.com> wrote: >On 10/12/2016 08:53 AM, He

Re: Filesystem for backup system

2016-10-12 Thread cs
On 12Oct2016 09:40, Mike Wright wrote: On 10/12/2016 08:53 AM, Heinz Diehl wrote: On 10.10.2016, Gordon Messmer wrote: Ext4 is probably a better option for a filesystem with a large number of small files. XFS continues to be slower for metadata operations. It

Re: Filesystem for backup system

2016-10-12 Thread cs
On 12Oct2016 08:40, Gordon Messmer wrote: On 10/12/2016 06:40 AM, Michael Cronenworth wrote: "Never needs fsck"? What crazy alternate reality do you live in? It's only slightly exaggerated. XFS has online fsck, which means that the kernel can fix some errors as it

Re: Filesystem for backup system

2016-10-12 Thread George N. White III
On Wed, Oct 12, 2016 at 2:03 PM, Gordon Messmer wrote: > On 10/12/2016 08:53 AM, Heinz Diehl wrote: > >> It was, some years ago. This is no longer the case. >> > > > I suggest that users evaluate their options under their own workload. > When I ran tests last year on

Re: Filesystem for backup system

2016-10-12 Thread Gordon Messmer
On 10/12/2016 08:53 AM, Heinz Diehl wrote: It was, some years ago. This is no longer the case. I suggest that users evaluate their options under their own workload. When I ran tests last year on CentOS 7 for rsnapshot storing maildirs (the exact workload in question here), ext4 was

Re: Filesystem for backup system

2016-10-12 Thread Mike Wright
On 10/12/2016 08:53 AM, Heinz Diehl wrote: On 10.10.2016, Gordon Messmer wrote: Ext4 is probably a better option for a filesystem with a large number of small files. XFS continues to be slower for metadata operations. It was, some years ago. This is no longer the case. Given those, would

Re: Filesystem for backup system

2016-10-12 Thread Heinz Diehl
On 10.10.2016, Gordon Messmer wrote: > Ext4 is probably a better option for a filesystem with a large number of > small files. XFS > continues to be slower for metadata operations. It was, some years ago. This is no longer the case. ___ users

Re: Filesystem for backup system

2016-10-12 Thread Gordon Messmer
On 10/12/2016 06:40 AM, Michael Cronenworth wrote: "Never needs fsck"? What crazy alternate reality do you live in? It's only slightly exaggerated. XFS has online fsck, which means that the kernel can fix some errors as it encounters them. Others... well, I *have* seen XFS require an

Re: Filesystem for backup system

2016-10-12 Thread Michael Cronenworth
On 10/10/2016 04:58 PM, c...@zip.com.au wrote: Use XFS. It is stable; never needs fsck. If ext4 needs to repair it will take days/weeks on a filesystem that size, and need insane amounts of RAM (if the NAS is hosting this, it may not have much RAM). Both will work until you need to fsck (eg

Re: Filesystem for backup system

2016-10-10 Thread Alex
Hi, On Mon, Oct 10, 2016 at 5:58 PM, wrote: > On 10Oct2016 15:59, Michael Cronenworth wrote: >> >> On 10/10/2016 03:50 PM, Alex wrote: > > Where did you read that? AFAIK the default continues to be ext4. >>> >>> I thought I recalled it being the

Re: Filesystem for backup system

2016-10-10 Thread cs
On 10Oct2016 15:59, Michael Cronenworth wrote: On 10/10/2016 03:50 PM, Alex wrote: Where did you read that? AFAIK the default continues to be ext4. I thought I recalled it being the default during install the last time I performed one. The Fedora Server installation

Re: Filesystem for backup system

2016-10-10 Thread Michael Cronenworth
On 10/10/2016 03:50 PM, Alex wrote: >Where did you read that? AFAIK the default continues to be ext4. I thought I recalled it being the default during install the last time I performed one. The Fedora Server installation defaults to XFS. Workstation defaults to ext4. For your use case

Re: Filesystem for backup system

2016-10-10 Thread Alex
Hi, On Mon, Oct 10, 2016 at 12:17 PM, Patrick O'Callaghan wrote: > On Mon, 2016-10-10 at 11:25 -0400, Alex wrote: >> I suppose I'm most familiar with ext4, although I understand xfs is >> the default filesystem during install now. > > Where did you read that? AFAIK the

Re: Filesystem for backup system

2016-10-10 Thread Gordon Messmer
On 10/10/2016 09:17 AM, Patrick O'Callaghan wrote: On Mon, 2016-10-10 at 11:25 -0400, Alex wrote: >I suppose I'm most familiar with ext4, although I understand xfs is >the default filesystem during install now. Where did you read that? AFAIK the default continues to be ext4. Alex is

Re: Filesystem for backup system

2016-10-10 Thread Patrick O'Callaghan
On Mon, 2016-10-10 at 11:25 -0400, Alex wrote: > I suppose I'm most familiar with ext4, although I understand xfs is > the default filesystem during install now. Where did you read that? AFAIK the default continues to be ext4. > I believe most files will be maildir style email files, as well as