ext3 offers many features as a file system - journaling as well as very efficient directory indices.
-1
votes
0answers
66 views
Debian package performance on XFS, btrfs, ext3, ext4
I did 4 clean installations of debian 6 and measured time of installing some average virtual package. FS options are default.
time apt-get install build-essential
I got very strange results ...
1
vote
1answer
34 views
Relatime vs noatime for flash drives
I am running a web server off of a SheevaPlug, and the OS and system are stored on an SD card with an ext3 file system. I know that atime is a major source of writes that wear out flash memory.
...
-2
votes
2answers
90 views
How can I “trick” an ext3 directory to store more than 32000 sub dirs
The easy answers are 1.) move to ext4 and/or 2.) "shard" the directory somehow - by placing them in sub folders either numbered or lettered.
These changes won't be easy to make though so I'm looking ...
2
votes
2answers
72 views
Consolidate separate /var and swap drives back to / drive in CentOS
The genius that originally set up the web server at my company put the swap, /var, and / directories on different drive pairs. I need to some how consolidate all three into one drive for migration ...
1
vote
2answers
66 views
After using lvextend, I can't recover unused space
I needed to add more disk space to my CentOS VM, so I added another virtual disk, then used lvextend to add the space to the existing partition.
The steps I followed was:
echo "- - -" > ...
3
votes
3answers
136 views
CentOS disable filesystem check: superblock last mount time is in the future
I'm persistently getting the "Superblock last mount time is in the future" error when booting CentOS 6. I've seen other questions which ask how to resolve this error, but I know exactly why it's ...
-1
votes
1answer
54 views
format a volume as xfs
I have a partition that is formatted as ext3
I dd unmount it. Formatted as xfs (for quicker format) and I got an error.
When I formatted it as ext3 again, it worked. What is the command to format an ...
-1
votes
2answers
34 views
Filesystem check on ext3, debian
How can I perform a filesystem check on ext3 partition on linux? I am looking for a solution that check every file on the filesystem that is it accessible.
UPDATE:
I would run it on a server without ...
2
votes
1answer
49 views
Recovering the remainder of an ext3 volume spread over multiple lvm physical volumes
I have an LVM logical volume spread over eight separate physical volumes on Amazon AWS. The logical volume is formatted using ext3.
One of my physical volumes has failed. Is there any way to recover ...
0
votes
2answers
66 views
Asterisk using 100% of the cpu and freezing my debian host
I have a Debian host
$ uname -a
Linux voip 2.6.25-2-amd64 #1 SMP Mon Jul 14 11:05:23 UTC 2008 x86_64 GNU/Linux
Old asterisk
asterisk 1:1.4.21.2~dfsg-3
It has been ...
3
votes
4answers
138 views
Rsync -avzHP follows hardlinks instead of copying them as hardlinks
I use rsnapshot to create hourly/daily/weekly/monthly backups of my "work"-share. Now I'm trying to copy the whole backup-directory onto an external drive using rsync.
I used this command/parameters ...
0
votes
0answers
119 views
Xen VM, LVM, snapshot and need to run fsfreeze
fsfreeze man page says
fsfreeze is unnecessary for device-mapper devices. The device-mapper (and LVM) automatically freezes filesystem on the device when a snapshot creation is requested. For more ...
0
votes
3answers
70 views
How many subdirectories does the XFS filesystem support within a given directory?
EXT3 supports 32,000 subdirectories.
EXT4 supports 64,000...
I've read about people having millions of subdirectories on the XFS filesystem, but can't find an exact value referenced anywhere.
How ...
4
votes
6answers
176 views
How does the number of subdirectories impact drive read / write performance on Linux?
I've got an EXT3 formatted drive on a Linux CentOS server. This is a web app data drive and contains a directory for every user account ( there are 25,000 users ). Each folder contains files that ...
0
votes
0answers
33 views
Recover data from failed volume group disk
I have a tale of woe to tell. I had (notice the past tense) a LVM VolumeGroup comprised of two physical volumes that failed due to the accidental deletion of one of those volumes. I am now trying to ...
2
votes
2answers
72 views
What is the best structure to save incremental subfolders?
I have 3 different folders containing particular information about sales orders. Everything was working fine but a few days ago I started having an issue about the amount of subdirectories in each of ...
0
votes
1answer
78 views
Problems with degraded RAID arrays
My Ubuntu backup server was recently upgraded in storage space to a RAID 10 array... now it consists of 8T of raw drive space which was before 2T of space.
But I have been having trouble when it ...
-1
votes
1answer
320 views
EXT3 vs EXT4 vs XFS
Recently I read a lot about "new" file systems.
I checked some benchmarks that show MySQL working faster on EXT4 or XFS (and some other FS).
I also "found" that XFS and EXT4 are included in CentOS ...
3
votes
2answers
86 views
ext3 Snapshot Support
Does the ext3 filesystem support snapshotting? If so, is can this be done with straight partitions with no LVM?
An example of "straight partitions" would be the following:
/dev/sda1 /boot ext3
...
0
votes
0answers
90 views
recovering a deleted file from a VM snapshot?
Our mysql ibdata1 file was deleted earlier today. This wasn't noticed until mysqld was restarted and there was no data in the tables. The machine is a CentOs VM in Xenserver. At this point a ...
2
votes
3answers
136 views
Recover data from EXT3 filesystem
Our junior sysadmin accidently deleted some of the directories. Can anyone please suggest any free/proprietary application to recover files from an EXT3 filesystem (RHEL 5.x) ?
1
vote
1answer
67 views
“hot swapping” linux md raid1 - does re-mounting file-system temporarily read-only enable safe disconnection?
There's is an ext3 filesystem on top of Linux md raid1, array consists of two hard drives. Various services, including databases run on and write to it.
Let's say for argument's sake that to minimize ...
2
votes
2answers
73 views
Storing 64000+ files and growing in one folder (ext3)
I'm using a directory as a staging area for my files before shipping them to Amazon S3 buckets. This staging directory has no sub-directory structure /a/b/c or /year/month/day ... it's only files ...
2
votes
1answer
69 views
double mount check with ext3
I have two nodes connected to a SAN, and I want to be able to mount an ext3 partition on node B when node A goes down.
I know I could use a shared filesystem, but for simplicity and performance I ...
2
votes
0answers
84 views
Updating OpenBoot PROM on Sun Fire v440
After i have updated ALOM firmware on Sun Fire v440, i decided to update OpenBoot PROM, but when i try to load the patch using
boot disk /flash-update-SunFire440
i get:
SILO
Fatal Error: Multiple ...
5
votes
2answers
98 views
Slower/cached Linux file system required
I know it sounds odd but I need a slower or cached filesystem.
I have a lot of firewalls that are syslog'ing their data to a pair of Linux VMs which write these files to their 'local' (actually FC ...
2
votes
1answer
177 views
Mounting an LVM EXT3 dd in linux
I'm using Ubuntu and am getting an error that tells me the filesystem can not be identified when I try to mount a LVM ext3 disk. I'm passing "ext3" as the type and have been able to mount ext2 disks. ...
0
votes
0answers
27 views
compress to another disk, then move back slower than operating on single disk
Could you help me understand performance differences, I've experienced compressing some data?
The story is that I compress various files (20kB-600MB) in 2e20 chunks from one LUN to another.
Then I ...
0
votes
1answer
55 views
Best practices for choosing fs fragment size etc
Related question about block sizes, but there are many many other options when creating an ext3 filesystem.
I think the other question has an answer with great advice of block size, that it general ...
2
votes
0answers
170 views
Apache's htcacheclean doesn't scale: How to tame a huge Apache disk_cache?
We have an Apache setup with a huge disk_cache (>500.000 entries, >50 GB disk space used).
The cache grows by 16 GB every day.
My problem is that the cache seems to be growing nearly as fast as it's ...
4
votes
2answers
61 views
How to compact large directories
Is there a way to compact a very large directory under EXT2/EXT3 without simply remaking the directory?
I recall that perlfunc cautions that the OS implementations of seekdir and telldir run the risk ...
1
vote
2answers
715 views
Server Frequently gets Read-Only File System
This server has RAID-1 configured. It get readonly file system everyday. if i reboot it, it gets back with a read-write file system. but after a short while, readonly again...
Any idea please? ...
2
votes
1answer
329 views
e2fsck / resize2fs problems
I've got 6 drives (each 1.5T, all same model and firmware revision) that are part of a RAID5 array. The RAID5 makes a LVM volume group and a logical group. The latter contains only one ext3 partition.
...
4
votes
3answers
697 views
Convert a software raid volume from ext3 to ext4 (or ext2)?
I have an mdadm created software raid volume in my ubuntu linux 11 machine. It is NOT the boot drive. It is a software raid 5 configuration made from 3 large sata drives.
When I created it ...
4
votes
2answers
536 views
ext3_dx_add_entry: Directory index full
Background: I'm running lighttpd 1.4.28-1 on CentOS 5.3 to serve the static assets.
Signal: recently, it gets slow sometimes. I'm getting the below errors in the kernel log and /var/log/messages:
...
7
votes
1answer
797 views
From bad sector to “damaged file” - did it for Linux/ext3, can I do it for Windows/NTFS?
When a SMART check on a disk reports a bad sector, it is important to be able to identify the file that has the bad sector - and restore it from backups. Below, I show how I did this for my Linux/ext3 ...
0
votes
1answer
167 views
EXT3-FS: error (loop0) ext3_lookup unlinking inode
Running CentOS 5.6 with mdadm RAID1, 2TB, 3 partitions (boot, swap and root). I had a kernel panic in the server, and after rebooting, the system stays up for about 5-10 minutes, the it starts ...
1
vote
1answer
251 views
How to diagnose very bad and slow ext3 behavior?
I'm managing an old admin server running Redhat WS4 update 3, and we have an ext3 volume where I had a large (30GB) sqlite database mounted on /opt.
Everytime I do large queries/inserts into this ...
0
votes
2answers
61 views
Convert Ext3 to Ext4 Filesystem failed because I cannot umount drive
I want to convert my Filesystem from Ext3 to Ext4 because of 32000 directory limit of Ext3. But when I want to umount the drive I get this error:
umount: /: device is busy
umount: /: device is busy
...
5
votes
1answer
112 views
upgrading ext3 fs on ubuntu 8.04
so we are stuck with this closed source system that keeps on adding folders to one directory, and it's going to hit the 32k limit soon because it's ext3. and that folder is expected to have +100k ...
0
votes
1answer
116 views
sharing an ext3/ext4 partition on external drive
is there a way of sharing an ext3/ext4 formatted partition on an external USB drive between different users (uids) on different Linux machines without creating a group for this purpose, setting the ...
1
vote
2answers
72 views
Directory in Linux(ext3) with only 2 files occupies 32000 blocks(16Mbytes)
IIRC my Operating Systems classes, the size of a directory in Linux is given by the number of files it contains([wikipedia link])1
So, why a directory with only 2 files occupies 32000 blocks?
# stat ...
2
votes
3answers
346 views
how do I convert a live root ext3 filesystem to ext4?
I have a root filesystem thats live and mounted and I'd like to convert it to ext4. All the howto's i've read deal with booting off a live CD but thats not an option.
1
vote
2answers
198 views
Any chance to recover formatted hard drive LVM to ext3
I am a big fool. But i believe this could be the event for every serious linux administrator. I Accidentally formatted my hard drive from LVM to Ext3. I tried some of the recovery tools. I can see ...
2
votes
2answers
79 views
How many files can I have directly under a directory in ext3?
I have a root directory 'data_0'.
Under this directory are about 15,000 directories ('a', 'b', 'c', ... 'aa', 'ab' ...).
Under each of theses directories there are thousands of very small files ...
0
votes
0answers
115 views
Redhat ext3 and/or powerpath issue
We are running Redhat EL 5 update 3 with Powerpath 5.3sp1. We did a FLARE upgrade on clariion and during SP upgrade, one of the emcpower devices which is mounted as ext3(using LVM) mounted as ...
2
votes
1answer
558 views
Linux filesystem of VM becomes crash or read-only at Citrix XenServer
I read some answers related to this problems.
Will the OS crash if the system partition can't be access for a short period?
But I cannot solve this problem.
When using ISCSI as Storage Repository ...
2
votes
2answers
54 views
EXT3 File recovery after OS re-install
I know the probability of this is very low, but I have a 250G hard drive that I just reformatted and re-installed the OS on (centos, ext3). It turns out there was one large file (a 20G xen image) on ...
1
vote
2answers
29 views
System crashes after ext3_block_to_path
I have some soft which runs by cron. But once per day system crashes and only reboot helps.
This is the latest log (/var/log/syslog) before crashing:
Jul 31 05:00:01 T217 /USR/SBIN/CRON[22629]: ...
2
votes
1answer
161 views
How to repair a ext3 filesystem other than fsck
Are there any specialized/preferred tools to repair a filesystem for ext3 (or ext4) other than fsck.ext3, fsck.ext4?
Thanks
