Ken Gaillot napsal(a):
On Fri, 2018-02-09 at 12:52 -0500, Digimer wrote:
On 2018-02-09 03:27 AM, Jan Pokorný wrote:
Hello,
there is certainly whole can of these worms, put first that crosses
my mind: performing double (de)compression on two levels of
abstraction
in the inter-node communication is not very clever, to put it
mildly.
So far, just pacemaker was doing that for itself under certain
conditions, now corosync 3 will have it's iron in this fire through
kronosnet, too. Perhaps something to keep in mind to avoid
exercises in futility.
Can pacemaker be told to not do compression? If not, can that be
added
in pacemaker v2?
Or better yet, is there some corosync API call we can use to determine
whether corosync/knet is using compression?
Sure. Just read "totem.knet_compression_model" cmap key. If it doesn't
exists or is "none", compression is disabled.
Honza
There's currently no way to turn compression off in Pacemaker, however
it is only used for IPC messages that pass a fairly high size
threshold, so many clusters would be unaffected even without changes.
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