Re: GlusterFS performance for random file acess

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Dear Amar,

Thank you for the advice.

(Actually, I used byte units, like, 16384 for 16KB)

The thing is, 128KB page-size, while gives full throughput, seems to kill Rewrite completely, as one could see from the Table down below in the quote. There I used page-size 128KB and page-count of 2.

--
Best regards,
Grigory Shamov
Kazan Science Centre of RAS,
Kazan, Russian Federation


Amar wrote:
Hi,
 With read-ahead 'option page-size 16kB' you may not achieve maximum
throughput, so, better try 'option page-size 128kB' (Note that 16K is just
treated as 16bytes, as the parser needs 'KB' 'MB' 'GB' as the unit, not K,
M, or G respectively).

Regards,
Amar



On Dec 19, 2007 10:56 PM, Grigory Shamov <gas@xxxxxx> wrote:
Dear GlusterFS developers,

Some of the Bonnie++ results are
like this:

===============================================
  FileSystem:     Sequential Output , K/sec
                  Per-char    Block     Rewrite
===============================================
  NFS               14442      30419      7710
  Lustre            16012      35228     19018
  GlusterFS         16582      15833      8358
  GlusterFS, wb     17988      43774      8409
  GlusterFS, ra     18414      15863      1804
  GlusterFS, ra, wb 22403      41821       355
===============================================
FileSystem:     Sequential Input, K/sec Random
                  Per-char    Block      seeks, #/s
===============================================
  NFS               20229      49510      178.8
  Lustre            17284      47753       53.0
  GlusterFS         16791      16815      161.4
  GlusterFS, wb     15304      17438      174.1
  GlusterFS, ra     19420      54803      143.3
  GlusterFS, ra, wb 19900      54427      144.4
===============================================







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