On 20/08/28 22:39, Ram Ramesh wrote:
On 8/28/20 12:46 PM, Roman Mamedov wrote:
On Thu, 27 Aug 2020 21:31:07 -0500
Also my impression is that LVM has more solid and reliable codebase, but
bcache might provide a somewhat better the performance boost due to
caching.
Thanks for the info on bcache. I do not think it will be my favorite. I
am going to try LVM cache as my first choice. Note that the new disks
will be spare disks for some time and I will be able to try out a few
things before deciding to put it into use.
I had some _very nasty_ adventures with LVM's cache, that ended with
rather massive corruption at the end of the last year. I described it in:
https://github.com/lvmteam/lvm2/issues/26
though not much from that was answered or commented, except confirmation
that flushing issue was fixed.
At the same time I have yet to have bcache failing on me (and it - so
far flawlessly - did survive kernel panics (bugged nic drivers) and
disks dying).
YMMV of course, just _make sure_ to have backups. And make sure to test
it thoroughly in your setup (including things like hard reset).
