How to alter the IO data block size to cater with large volume of small transactions
Article ID: 100024900
Updated On:
Resolution
With smaller size of the IO data block set in file system level, the application transaction can gain a better performance.
e.g setting IO data size in 256KB
# vxtunefs -o max_direct_iosz=262144
To make this setting persistent in local system, add an entry to /etc/vx/tunefstab
Applies To
In VxFS file system level, the max. data packet IO size is 1 MB by default.
# vxtunefs | grep max_direct_iosz
max_direct_iosz = 1048576
1048576 bytes / 1024 is equal to 1 MB
Issue/Introduction
From an application perspective, there could be a need to speed up the data update quickly among a large number of transactions with small data packet size.
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