Hi,
According to
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6-Beta/html-single/6.6_Release_Notes/index.html#bh-storage,
dm-cache and dm-era have been added into RHEL6.6 as technology preview,
but I couldn't find any other documentation about using dm-cache and
dm-era. I found the following utilities in
/usr/sbin/era_check
/usr/sbin/era_dump
/usr/sbin/era_invalidate
/usr/sbin/cache_check
/usr/sbin/cache_dump
/usr/sbin/cache_repair
/usr/sbin/cache_restore
I guess these utilities are related to dm-era and dm-cache,
respectively. There are only manpages for the cache utilities. After
reading the manpages I still have no clue how to use these
technologies. I want to do a sanity check of these technologies on my
SAN storage. Is it possible to try dm-cache and dm-era without a SSD?
e.g. using ram to imitate a fast block device..
Any idea?
Thanks
Romu
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