…=test run On Dell R900 with CentOS 5.2 and ext3 filesystem we get 1060 transactions/sec with single thread and sync… but results were basically the same. Using XFS instead of EXT3 gives expected results – we get 2350 transactions/sec with sync… is about 10% overhead. EXT2 filesystem also behaves similar to XFS so it seems to be EXT3 specific performance issue. We do…
Comment: Disaster: LVM Performance in Snapshot Mode
February 9, 2009 By 55 Comments
… the filesystem (VxFS). If you use LVM snapshots the choice of the filesystem can be quite important. I run “randomio” benchmark on ext3 filesystem…. There are 2 issues with ext3. The first one is that it is not an extent based filesystem. It is block based… the level of parallelism a filesystem allows when it comes to competing reads/writes. I believe that ext3 is taking an exclusive…
Post: Make your file system error resilient
August 24, 2011 By 8 Comments
…) Filesystem volume name: Last mounted on: /mnt/data Filesystem UUID: f9f7a0c3-0350-46d5-9930-29c3ac1f4b32 Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features… worth to note when error is discovered during the operation EXT3, EXT4 filesystem will force file system check on the next startup… are valid. First with recent Linux versions and quality hardware EXT3 filesystem is extremely stable (EXT4 is good too though It is…
Post: MySQL File System Fragmentation Benchmarks
March 21, 2008 By 28 Comments
… and Innodb tables on ext3 filesystem. Here is what I found: The fragmentation we speak in this article is filesystem fragmentation or internal… however insert speed dropped 20 times. This could be because ext3 does not like so many files in directory or because…. Note: As I checked later contrary to my expectation this filesystem was created without dir_index option which should add significant…
Comment: Jeremy Cole on MySQL Replication
May 27, 2006 By 12 Comments
… small binary log events constantly or near constantly, to an ext3 filesystem set with data=journal, I think that’s nearly the…
Comment: Maximal write througput in MySQL
March 5, 2010 By 10 Comments
Vadim, What filesystem did you use here ? I remember EXT3 performs surprisingly bad with sync_binlog=1 http://www.mysqlperformanceblog.com/2009/01/21/beware-ext3-and-sync-binlog-do-not-play-well-together/ In any…
Comment: 10 things you need to know about backup solutions for MySQL
March 9, 2009 By 23 Comments
… backup solution works tracking modified blocks in a filesystem (I have used only ext3) with a kernel driver. So, after a FLUSH… a snapshot of the state of the blocks in the filesystem, and those are the blocks’ versions put into the backup…
Comment: Beware: ext3 and sync-binlog do not play well together
January 22, 2009 By 19 Comments
…’m not 100% sure, but I think EXT3 flushes all the transactions affecting the filesystem when you fsync a file and not only the transactions affecting the fsynced file. That could be slow if said filesystem…
Comment: ext4 vs xfs on SSD
May 3, 2012 By 26 Comments
… much of their recommendation comes from the days of ext2/ext3. So I decided to use sysbench and plot some graphs… who runs their own benchmarks, and am not religious about filesystems.
Post: ext4 vs xfs on SSD
March 15, 2012 By 26 Comments
As ext4 is a standard de facto filesystem for many modern Linux system, I am getting a lot … recommendation is xfs, and it comes to known problem in ext3, where IO gets serialized per i_node in O_DIRECT…
