Re: Filesystem for Maildir

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Heitor A.M. Cardozo wrote:
Christopher Chan wrote:

ext3 again takes the slowest performing title overall as expected...in fact it appears not much as changed fs vs fs wise since Bruce Guenter's tests.
I agree but the values are more "acceptable" in comparision with others filesystems. On Bruce tests it shows a very bad performance for reading.

Yes, reads are vastly improved at the cost of write performance. Weird. XFS has like the best read response times too. XFS is looking very good at the moment with just about the fastest performance in everything. What io-scheduler is default on Centos 5? I assume you prefer read performance to write performance. After all, it is for maildir use. Have you tuned the box for read performance?


But I am surprised at the overall performance regressions in comparison to 2.6.5/6 kernels with regards to deliveries vs amount of writers.Heitor, you are using a 3ware 95xx or 96xx with BBU write cache and write caching on right? How much RAM do you have for your cache? How is your raid10 configured? I cannot believe a four disk raid0 array can beat a software raid mirror of scsi disks as used by Bruce Guenter.

3ware 9650SE with BBU and write cache on.
Available memory: 224 MB
Bus Type/Speed: PCIe/2.5 Gbps
RAID10: 4 RAID1 subunits with MAXTOR STM3500630AS 500GB SATA2


Yup, that is four disks versus a single linux mirrored scsi array. Write performance cannot be that horrible now can it?


Thanks Heitor. Is the site down or something? I cannot access the page....it is timing out.
The site is online now.


thanks.
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