Greetings,
Short version:
Is there anyway to adjust the cache blocksize of the lvm cache with the
lvm tools?
Long version:
I have been exploring the new lvm-cache features within rhel7 (tech
preview, I know), and with a cache of 1.4TiB in size I noticed these
warnings within the logs.
device-mapper: cache: You have created a cache device with a lot of
individual cache blocks (1638400) All these mappings can consume a lot
of kernel memory, and take some time to read/write.Please consider
increasing the cache block size to reduce the overall cache block count.
However, I cannot find any straightforward method with which to adjust
this cache block size. I did find this documentation which explains how
to do so with device mapper:
https://www.kernel.org/doc/Documentation/device-mapper/cache.txt Is
there anyway to do this with the lvm tools, or is this yet to be developed?
Many thanks,
Devin
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