Date: Sun, 3 Mar 1996 19:41:43 -0800 (PST) From: "JULIAN Elischer" <julian@ref.tfs.com> To: rashid@rk.ios.com (Rashid Karimov) Cc: hackers@freebsd.org Subject: Re: pwd_mkdb - really slow :( Message-ID: <199603040341.TAA27629@ref.tfs.com> In-Reply-To: <199603040253.VAA07580@rk.ios.com> from "Rashid Karimov" at Mar 3, 96 09:53:17 pm
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> > HI there ppl, > > As I understand it, changes were made to do single-point changes, and to speed all this up in the 'passwd' case. to speed up mkpwd you would need a 'diff' file of before and after' and do the changes as a set of single-point changes. This requires that you trust the passwd.master and the database files to be correctly in sync. > > > I have quite afew systems here with ~10.00 accounts > on ea ... and pwd_mkdb is _very slow now ... Takes > 2+ minutes to rebuild the damn databases every time. > > I'm not concerned with passwd command , even though > as I understand it doesn;t do one-point update so far > and rebuilds everything from a scratch, but I'm trying > to somehow speed up the pwd_mkdb itself. > > So they're a few ways I can see looking at the source code . > For example it does two passes on a master password file > it's fed as a parameter - once for unsecure and once > for secure databases - so this could be made only once > and we can write in to db's in parallel, Secondly may > be I'll be able to reuse at least parts of the structure > used for db->put for secure and usecure db's. > And aslo - does any of programs actually use pwd info > indexed by line number ? Do we really need this pass > ( there're actually two passes) ? > > I want to check the the thing using profiler , just > to see what eats most time in the program ( I do have > a feeling already that it's all those dp->put's ). these might of course speed things up.. it might also be quicker to build the entire databse in ram and bang it out to disk as a single write.. :) > > > Rashid. >
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