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Child -> Parent pipe for COW info transferring.

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This commit is contained in:
antirez
2016-09-19 13:45:20 +02:00
parent e1eccf9a6b
commit e565632e59
6 changed files with 132 additions and 3 deletions
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5
src/aof.c
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@ -1319,6 +1319,7 @@ int rewriteAppendOnlyFileBackground(void) {
if (server.aof_child_pid != -1 || server.rdb_child_pid != -1) return C_ERR;
if (aofCreatePipes() != C_OK) return C_ERR;
openChildInfoPipe();
start = ustime();
if ((childpid = fork()) == 0) {
char tmpfile[256];
@ -1335,6 +1336,9 @@ int rewriteAppendOnlyFileBackground(void) {
"AOF rewrite: %zu MB of memory used by copy-on-write",
private_dirty/(1024*1024));
}
server.child_info_data.cow_size = private_dirty;
sendChildInfo(CHILD_INFO_TYPE_AOF);
exitFromChild(0);
} else {
exitFromChild(1);
@ -1345,6 +1349,7 @@ int rewriteAppendOnlyFileBackground(void) {
server.stat_fork_rate = (double) zmalloc_used_memory() * 1000000 / server.stat_fork_time / (1024*1024*1024); /* GB per second. */
latencyAddSampleIfNeeded("fork",server.stat_fork_time/1000);
if (childpid == -1) {
closeChildInfoPipe();
serverLog(LL_WARNING,
"Can't rewrite append only file in background: fork: %s",
strerror(errno));