rgw: add negative cache to the system object#35777
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cbodley merged 1 commit intoceph:masterfrom Jul 16, 2020
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mattbenjamin
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this looks potentially good--can you do a teuthology run?
cbodley
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src/rgw/rgw_cache.h
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| int status = 0; | ||
| uint32_t flags = 0; | ||
| uint64_t epoch = 0; | ||
| bool noentry = false; |
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doesn't this just duplicate the int status field?
src/rgw/rgw_cache.cc
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| if(perfcounter) perfcounter->inc(l_rgw_cache_miss); | ||
| if(src.noentry) { | ||
| ldout(cct, 20) << "negative cache entry" << dendl; | ||
| return -ENODATA; |
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this shouldn't be counted or logged as a cache miss - it's a hit on a negative entry. i think we should move this check above of this 'flags' block, ie:
ObjectCacheInfo& src = iter->second.info;
+ if (src.status == -ENOENT) {
+ ldout(cct, 10) << "cache get: name=" << name << " : hit (negative entry)" << dendl;
+ if (perfcounter) perfcounter->inc(l_rgw_cache_hit);
+ return -ENODATA;
+ }
if ((src.flags & mask) != mask) {we shouldn't treat any status other than ENOENT as a negative entry - if we got any other error trying to read it, that shouldn't prevent us from trying again
add negative cache to the system object Signed-off-by: Or Friedmann <ofriedma@redhat.com> Fixes: https://tracker.ceph.com/issues/45816
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cbodley
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add negative cache to the system object
Signed-off-by: Or Friedmann ofriedma@redhat.com
Fixes: https://tracker.ceph.com/issues/45816