Search String: Display: Description: Sort:

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*howto\s+preallocate\s+to\s+minimize\s+fragmentation\s*$/: 32 ]

Total 32 documents matching your query.

1. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Stewart Smith <stewart@xxxxxxxxxxxxxxxx>
Date: Thu, 13 Apr 2006 15:10:00 +1000
Are we going to see this be part of posix_fallocate in glibc any time soon? The patch would be fairly trivial and then let application programmers use a standard interface that has a nice fallback in
/archives/xfs/2006-04/msg00052.html (8,923 bytes)

2. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Nathan Scott <nathans@xxxxxxx>
Date: Thu, 13 Apr 2006 15:23:29 +1000
I'd be dumbstruck if so. It really needs a proper fs-independent system call. This keeps coming up, and an interface has even been discussed on LKML in the past - just needs some guy to go do it. Som
/archives/xfs/2006-04/msg00053.html (9,424 bytes)

3. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Stewart Smith <stewart@xxxxxxxxxxxxxxxx>
Date: Thu, 13 Apr 2006 17:06:27 +1000
maybe I'll get around to that this weekend :) I've got some ideas for some good API features that we could use (being people who are rather picky about performance and predictability in certain areas
/archives/xfs/2006-04/msg00055.html (10,389 bytes)

4. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Chris Wedgwood <cw@xxxxxxxx>
Date: Thu, 13 Apr 2006 17:04:55 -0700
i did kernel patches and an attempt at the glibc part of it for i386 and amd64, it needs a cleanup and reposting though. right now there is only support for xfs and ext[23], im not sure if other fs's
/archives/xfs/2006-04/msg00060.html (8,881 bytes)

5. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Stewart Smith <stewart@xxxxxxxxxxxxxxxx>
Date: Thu, 13 Apr 2006 15:10:00 +1000
eers
/archives/xfs/2006-04/msg00157.html (8,923 bytes)

6. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Nathan Scott <nathans@xxxxxxx>
Date: Thu, 13 Apr 2006 15:23:29 +1000
k in
/archives/xfs/2006-04/msg00158.html (9,424 bytes)

7. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Stewart Smith <stewart@xxxxxxxxxxxxxxxx>
Date: Thu, 13 Apr 2006 17:06:27 +1000
x-me
/archives/xfs/2006-04/msg00160.html (10,389 bytes)

8. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Chris Wedgwood <cw@xxxxxxxx>
Date: Thu, 13 Apr 2006 17:04:55 -0700
nion
/archives/xfs/2006-04/msg00165.html (8,881 bytes)

9. howto preallocate to minimize fragmentation (score: 1)
Author: Ying-Hung Chen <ying@xxxxxxxxxxxxxx>
Date: Thu, 22 Sep 2005 19:40:41 +0800
Hi there, we are storing realtime streaming data (multiple/random writes) in our Linux system with XFS filesystem and suffering from heavy fragementation 2GB files) before using the file system. we a
/archives/xfs/2005-09/msg00148.html (8,236 bytes)

10. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Eric Sandeen <sandeen@xxxxxxx>
Date: Thu, 22 Sep 2005 07:23:07 -0500
2GB files) before using the file system. we are creating the 'quick' sparse file like the following: (is this cause the problem?) /bin/dd if=/dev/zero of=/mnt/file.ivf bs=1M seek=2000000 count=1 We a
/archives/xfs/2005-09/msg00153.html (9,517 bytes)

11. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Ying-Hung Chen <ying@xxxxxxxxxxxxxx>
Date: Thu, 22 Sep 2005 22:29:32 +0800
Hello again, Thanks for the info, here are more specifics on what we are trying to do: we have 200GB of harddive and would like to create 90-95 of 'video' file, each with 2GBs (data will be writting
/archives/xfs/2005-09/msg00154.html (9,542 bytes)

12. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Eric Sandeen <sandeen@xxxxxxx>
Date: Thu, 22 Sep 2005 09:40:08 -0500
Ying-Hung Chen wrote: See the xfsctl man page from xfsprogs, specifically XFS_IOC_RESVSP creating a sparse file will not help with fragmentation, unfortunately. Hello again, Thanks for the info, here
/archives/xfs/2005-09/msg00155.html (10,383 bytes)

13. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Ying-Hung Chen <ying@xxxxxxxxxxxxxx>
Date: Thu, 22 Sep 2005 22:56:54 +0800
does this mean, if I create a 2GB file via dd (not sparse file), when i 'overwrite' to the same file, it will stay there? (same physical place) I just thought of wild idea... since i am creating 90
/archives/xfs/2005-09/msg00156.html (9,599 bytes)

14. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Eric Sandeen <sandeen@xxxxxxx>
Date: Thu, 22 Sep 2005 10:04:51 -0500
Ying-Hung Chen wrote: pre-allocation before writing would still be your best bet. If you pre-allocate on a fresh fs before writing, you should get very large extents. does this mean, if I create a 2G
/archives/xfs/2005-09/msg00157.html (10,668 bytes)

15. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Andrew Ho <andrewho@xxxxxxxxxxxxx>
Date: Thu, 22 Sep 2005 11:31:49 -0400
Ying-Hung Chen wrote: pre-allocation before writing would still be your best bet. If you pre-allocate on a fresh fs before writing, you should get very large extents. does this mean, if I create a 2G
/archives/xfs/2005-09/msg00158.html (11,257 bytes)

16. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Ying-Hung Chen <ying@xxxxxxxxxxxxxx>
Date: Thu, 22 Sep 2005 23:34:28 +0800
actually, performance is the problem got my attention, and when i run xfs_db and check the fragmentation, its well over 95% on one 200GB partition...... -Ying
/archives/xfs/2005-09/msg00159.html (9,671 bytes)

17. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Ying-Hung Chen <ying@xxxxxxxxxxxxxx>
Date: Thu, 22 Sep 2005 23:39:35 +0800
okay, I'll give it a try tomorrow, just want to make sure, int xfsctl (const char *path, int fd, int cmd, void *ptr); path is actually the filename right? and fd is the FILE* where I open the filena
/archives/xfs/2005-09/msg00160.html (9,687 bytes)

18. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Eric Sandeen <sandeen@xxxxxxx>
Date: Thu, 22 Sep 2005 10:45:02 -0500
Ying-Hung Chen wrote: I guess while you played your video file, which was 2GB. Your video images were not smoothly shown on the player. It gave you an impression that there was a problem on the files
/archives/xfs/2005-09/msg00161.html (11,355 bytes)

19. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Ying-Hung Chen <ying@xxxxxxxxxxxxxx>
Date: Fri, 23 Sep 2005 14:31:12 +0800
when I run the sample code, and created "testfile" [yhchen@fc3 ~]$ ./xfs_fcntl testfile [yhchen@fc3 ~]$ ls -l testfile -rwx-- 1 yhchen yhchen 0 Sep 23 14:17 testfile [yhchen@fc3 ~]$ du testfile 2048
/archives/xfs/2005-09/msg00165.html (10,371 bytes)

20. Re: howto preallocate to minimize fragmentation (score: 1)
Author: Eric Sandeen <sandeen@xxxxxxx>
Date: Fri, 23 Sep 2005 07:58:09 -0500
Ying-Hung Chen wrote: when I run the sample code, and created "testfile" [yhchen@fc3 ~]$ ./xfs_fcntl testfile [yhchen@fc3 ~]$ ls -l testfile -rwx-- 1 yhchen yhchen 0 Sep 23 14:17 testfile [yhchen@fc3
/archives/xfs/2005-09/msg00168.html (11,006 bytes)


This search system is powered by Namazu