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add a comment that sometimes sending remote calls straight to the

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lmaster instead of what the nodes think is the dmaster (which might be 
stale) improve performance.

(This used to be ctdb commit f535f79e6a2a6c6d07141b96e0b957fa93c684f4)
This commit is contained in:
Ronnie Sahlberg 2007-04-23 17:05:09 +10:00
parent 1bb55c1f77
commit 42971d6565
1 changed files with 8 additions and 0 deletions
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8
ctdb/common/ctdb_call.c
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@ -716,6 +716,14 @@ struct ctdb_call_state *ctdb_daemon_call_send_remote(struct ctdb_db_context *ctd
state->c->hdr.ctdb_version = CTDB_VERSION;
state->c->hdr.operation = CTDB_REQ_CALL;
state->c->hdr.destnode = header->dmaster;
/*
always sending the remote call straight to the lmaster
improved performance slightly in some tests.
worth investigating further in the future
state->c->hdr.destnode = ctdb_lmaster(ctdb_db->ctdb, &(call->key));
*/
state->c->hdr.srcnode = ctdb->vnn;
/* this limits us to 16k outstanding messages - not unreasonable */
state->c->hdr.reqid = idr_get_new(ctdb->idr, state, 0xFFFF);