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New Proxy cache overlay
I've just committed a rewrite of the proxy cache code, restructuring it as an
overlay and plugging a bunch of memory leaks along the way. I intend to
remove the proxycache support from slapd & back-meta Real Soon.
I've changed the config syntax a little bit. The overlay automatically
attaches a database backend underneath the proxy. Since the two backends are
coexisting like this, you no longer need the cacheRewrite parts of the
rewrite engine.
I've also removed the "queryid" attribute from the system schema. The overlay
adds it to the schema at runtime now. (This change to slap.h etc is not yet
committed. It needs to be before you can compile/run the overlay though.)
I haven't re-implemented the cache consistency check yet, will use the
runqueue support for that.
Here's the config I use now for test020, which passes this test. Compare with
the current tests/data/slapd-proxycache.conf...
####
moduleload ../servers/slapd/overlays/pcache.la
#######################################################################
# database definitions
#######################################################################
database ldap
suffix "o=University of Michigan,c=US"
uri ldap://127.0.0.1:9011
overlay proxycache
proxycache bdb 100 2 10 60
proxyattrset 0 sn cn title uid
proxyattrset 1 mail postaladdress telephonenumber cn uid
proxytemplate (|(cn=)(sn=)) 0 60
proxytemplate (sn=) 0 60
proxytemplate (uid=) 1 60
proxytemplate (mail=) 0 60
cachesize 20
directory ./testrun/db.2.a
index objectClass eq
index cn,sn,uid,mail pres,eq,sub
I suppose I'm going to have to make a real makefile for the overlays
directory now, and do something about enabling its builds in the configure
script.
-- Howard Chu
Chief Architect, Symas Corp. Director, Highland Sun
http://www.symas.com http://highlandsun.com/hyc
Symas: Premier OpenSource Development and Support