Article ID: 1603
Last updated: 28 Mar, 2013
1) Jumbo frames in general does not significantly improve performance with 1Gb NIC and it is recommended to use default 1500 MTU. But, if your particular application require jumbo frames please use MTU 9000 for both nodes as well as for initiator system. Please note that if there are switches in between, they have to support MTU 9000 as well.
Note that those values are hardware dependent. The best is to try with different values. Good guide can be found here: ================= 15.3. Tuning recommendationsDRBD offers a number of configuration options which may have an effect on your system’s throughput. This section list some recommendations for tuning for throughput. However, since throughput is largely hardware dependent, the effects of tweaking the options described here may vary greatly from system to system. It is important to understand that these recommendations should not be interpreted as "silver bullets" which would magically remove any and all throughput bottlenecks. 15.3.1. Setting
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The recommendations outlined in this section should be applied only to systems with non-volatile (battery backed) controller caches. |
Systems equipped with battery backed write cache come with built-in means of protecting data in the face of power failure. In that case, it is permissible to disable some of DRBD’s own safeguards created for the same purpose. This may be beneficial in terms of throughput:
resource <resource> { disk { disk-barrier no; disk-flushes no; ... } ... }
Article ID: 1603
Last updated: 28 Mar, 2013
Revision: 1
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Views: 5912
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Posted: 12 Apr, 2012 by --
Updated: 28 Mar, 2013 by
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