On 19/02/2010 23:51, Stan Hoeppner wrote:
Rodolfo Gonzalez put forth on 2/19/2010 5:18 PM:
Hi,
This might be a silly question: which would be
the best inode ratio for a 5 Tb filesystem dedicated to Maildir++
storage? I use ubuntu server, which has a preconfigured setting for
mkfs.ext4 called "news" with inode_ratio = 4096, and after formating the
fs with that setting and then with the defautl setting I see this
difference of space (wasted space, but more inodes):
4328633696 free 1K-blocks with mkfs's "-T news" switch = 1219493877 free
inodes
4557288800 free 1K-blocks with default mkfs settings = 304873461 free
inodes
I'll be storing e-mail messages for around 20,000 accounts on that
partition (average 512 Mb per account). Would you consider worth the
waste of about 200 Gb of the filesystem space in exchange of more inodes?
If your version of Ubuntu server has XFS support built in, forget ext4 and go
XFS. It's more reliable, faster in every single benchmark I've seen especially
for large numbers of files, both large and small, has a ton of management tools
and instrumentation interfaces, and has a proven enterprise track record.
Someone posted about XFS some time back. It apparently can perform
well, but it will need some tuning (something to do with number of log
buffers from memory?) to perform well on Maildir type operations
Search around and benchmark is my suggestion (there are some mail
benchmarking programs)
Good luck
Ed W
