similar to: [Q] Is this true and does it mean there is dynamic defragmentation in ext2/3?

Displaying 20 results from an estimated 2000 matches similar to: "[Q] Is this true and does it mean there is dynamic defragmentation in ext2/3?"

2005 Jul 08
1
filesystem fragmentation stats?
Let me preface this by saying "Yes, I know *nix filesystems don't need to worry about fragmentation". That said, is there a way to check the overall level of fragmentation of a live ext3 filesystem? I know about filefrag, but that's for specific files. And I think e2fsck tells you, but only if you take the filesystem offline for the scan. Is there anything that will give
2005 May 19
3
[Q] Where does all the space go?
I created a filesystem as follows: mke2fs -j -O dir_index -O sparse_super -T largefile /dev/drbd/6 Here's the the output from df Filesystem Size Used Avail Use% /dev/drbd/6 475G 33M 452G 1% It seems that ext3 has taken 23 GB, which is about 5% of the total disk size, for itself. Is that right? If that is, indeed, the case, why does df just list 33M as being
2005 Jun 02
1
passwd : Module is unknown (Redhat 9 Enterprise Edition)
Hi All, Can anyone help me in resolving this problem. I use Redhat 9 Enterprise edition. I have a session in which I logged in as a root. When I issue the command "su" from any other user it is throwing error "su : Incorrect password", If I try to change the password from the root session, it is throwing error "passwd : module unknown". [root at TESTING
2005 Aug 11
2
URGENT: How to recover ext3 files?
Hi, After panic boot, I have executed fsck for the mount point and we couldn't find a single file. We have lot of directories under lost+found like this #3194985. Can anyone tell me how to recover the data from this folder? This is urgent. Thanks in advance for your help. Regards Kapil Sampath "Many of life's failures are people who did not realize how close they
2013 May 11
4
Defragmentation of large files
Hi list, I have a few large image files (VMware workstation VMDKs and TrueCrypt containers) which I routinely back up over the network to a btrfs raid10 volume via bigsync (https://code.google.com/p/bigsync/). The VM images in particular get really fragmented due to CoW, which is expected. I haven''t yet switched off CoW on the backups directory mainly to experiment and see what
2005 Apr 24
3
Help needed to recover data from ext3 file system where mkfs was issued accidentally
Hi, I connected my harddisk which had ext3 filesystem and some files archived in it as slave device and issued "mkfs /dev/hdb2" accidentally. Immediately I issued Ctrl C and stopped the process. But before that it had deleted some 100 Blocks. After that I am unable to boot that hard disk as primary device. The system is asking me "please insert a valid boot device and press
2005 May 22
4
FSCK of corrupted ext3 filesystem
Hello, I have a 1.3TB ext3 filesystem that has been in service for about 3 months. About 6 days ago the Emulex fibrechannel controller logged a SCSI error and the filesystem changed to RO. It appears that the filesystem instantly changes to RO and prevents the journal from working, therefore invalidating the filesystem. The filesystem was unmounted and a remount was attempted. The mount failed
2008 Mar 16
2
Filesystem fragmentation and scatter-gather DMA
When designing a filesystem, is fragmentation really an issue if access to the disk can be done using scatter-gather DMA techics ?
2012 Jan 07
14
zfs defragmentation via resilvering?
Hello all, I understand that relatively high fragmentation is inherent to ZFS due to its COW and possible intermixing of metadata and data blocks (of which metadata path blocks are likely to expire and get freed relatively quickly). I believe it was sometimes implied on this list that such fragmentation for "static" data can be currently combatted only by zfs send-ing existing
2013 Aug 01
3
filefrag and btrfs filesystem defragment and maybe snapshots
While exploring some btrfs maintenance with respect to defragmenting I ran the following commands: # filefrag /path/to/34G.file /path/to/5.7G.file /path/to/34G.file: 2406 extents found /path/to/5.7G.file: 572 extents found Thinking those mostly static files could be less fragmented I ran: # btrfs filesystem defragment -c /path/to/34G.file # btrfs filesystem defragment -c /path/to/5.7G.file and
2016 Sep 05
1
Defragmentation of memory
Dear all developers, I'm working with a lot of textual data in R and need to handle this batch by batch. The problem is that I read in batches of 10 000 documents and do some calculations that results in objects that consume quite some memory (calculate unigrams, 2-grams and 3-grams). In every iteration a new objects (~ 500 mB) is created (and I can't control the size, so a new object
2010 Sep 09
37
resilver = defrag?
A) Resilver = Defrag. True/false? B) If I buy larger drives and resilver, does defrag happen? C) Does zfs send zfs receive mean it will defrag? -- This message posted from opensolaris.org
2012 Sep 09
13
enquiry about defrag
Hi all, i am new on btrfs, i am testing KVM on btrfs (host: kernel x86-64 3.5.3), the performance is reasonable. I have two question on defrag, can someone help me? 1. According to btrfs wiki, defragment a COW file will produce two unrelated files. Does it apply to the "autodefrag" mount option? 2. Is there any command for the fragmentation status of a file/dir ? e.g. fragment
2006 Apr 17
1
EXT3-fs unexpected failure msg ?
Hi - We have had a raid failure, we have some what recovered but we continue to see the following ext3 message... Apr 17 14:59:14 acnlin84 kernel: EXT3-fs unexpected failure: (((jh2bh(jh))->b_state & (1UL << BH_Uptodate)) != 0); Apr 17 14:59:14 acnlin84 kernel: Possible IO failure. Since we have experienced several instances of ext3 file system corruption when we lose
2006 Jan 19
3
ext3 fs errors 3T fs
Hello, I looked through the archives a bit and could not find anything relevant, if you know otherwise please point me in the right direction. I have a ~3T ext3 filesystem on linux software raid that had been behaving corectly for sometime. Not to long ago it gave the following error after trying to mount it: mount: wrong fs type, bad option, bad superblock on /dev/md0, or too many
2006 Dec 13
2
Ext2/3 fs and defragmentationn
Hi all, Fewer days ago a CentOS box server suffered a manual and unexpected reset (too large to explain: there are silly people in everywhere). The result was the system did not mount de root (/) partition and the boot process was stopped. I repair it easily: boot from LiveCD (Knoppix in my case), umount root partition and pass the e2fsck utility. Because of that I've used several fs tools
2015 Nov 07
3
Re: mkfs.ext2 succeeds despite nbd write errors?
On Sat, Nov 7, 2015 at 5:03 AM, Richard W.M. Jones <rjones@redhat.com> wrote: > How about 'strace mkfs.ext2 ..' and see if any system calls are > returning errors. That would show you whether nbd-client is throwing > errors away, or whether mkfs is getting the errors and ignoring them > (seems pretty unlikely, but you never know). > > After that, it'd be down
2010 Apr 13
2
XFS-filesystem corrupted by defragmentation Was: Performance problems with XFS on Centos 5.4
Before I'd try to defragment my whole filesystem (see attached mail for whole story) I figured "Let's try it on some file". So I did > xfs_bmap /raid/Temp/someDiskimage.iso [output shows 101 extents and 1 hole] Then I defragmented the file > xfs_fsr /raid/Temp/someDiskimage.iso extents before:101 after:3 DONE > xfs_bmap /raid/Temp/someDiskimage.iso [output shows 3
2010 Oct 11
4
Horrible btrfs performance on cold cache
Hi, I use btrfs on most of my volumes on my laptop, and I''ve always felt booting was very slow, but definitely sure is slow, is starting up Google Chrome: encrypted ext4: ~20s btrfs: ~2:11s I have tried different things to find out exactly what is the issue, but haven''t quite found it yet. Here''s some stuff I got from latencytop, not sure if would be helpful:
2006 May 10
2
Why different directory sizes?
I just discovered two directories with the same number of files and the same number of hard links but different size: # stat /home/david/linuxburg/fax.old/docq_ps.nnnn \ /hdsync/home/david/linuxburg/fax.old/docq_ps.nnnn File: `/home/david/linuxburg/fax.old/docq_ps.nnnn' Size: 8192 Blocks: 16 IO Block: 4096 directory Device: 801h/2049d Inode: 52060