Re: (ITS#5640) slapd scans too many objects at startup

[ghenry@suretecsystems.com]

ali.pouya@free.fr wrote:
> Full_Name: Ali Pouya
> Version: 2.4.11
> OS: Linux 2.6
> URL: ftp://ftp.openldap.org/incoming/
> Submission from: (NULL) (145.242.11.4)
> 
> 
> I have a test directory with two mirrors A and B and a replica C connected to
> A.
> I usaually use server A for write operations. 
> 
> I encounter the following problems :
> 
> 
> 1) If the data base is initiated in stand alone (so serverID defaults to zero)
> and then I set serverIDs 1 and 2 for A and B then each time I start up slapd on
> C it scans all of the objects writtent on A afterwards, producing the followin
> log for each object :

Why do you change serverID?

> 
> ======================================================
> entry_decode: "cn=testr1,ou=resources,ou=mefi,o=gouv,c=fr"
> <= entry_decode(cn=testr1,ou=resources,ou=mefi,o=gouv,c=fr)
> => bdb_dn2id("cn=testr1,ou=resources,ou=mefi,o=gouv,c=fr")
> <= bdb_dn2id: got id=0x9
> => test_filter
>     GE
> => access_allowed: search access to "cn=testr1,ou=resources,ou=mefi,o=gouv,c=fr"
> "entryCSN" requested
> <= root access granted
> => access_allowed: search access granted by manage(=mwrscxd)
> <= test_filter 6
> ======================================================
> 
> For a directory with 10 million objects the this takes more than one hour (slapd
> is running but the service is not available).
> If I set  serverID=3 on the replica C the problem disapears.

So you're saying serverID=0, serverID=1, serverID=2 makes a difference 
from serverID=1, serverID=2, serverID=3?

They only have to be unique.

> 
> 2) If I do only one write operation on B, then I get two contextCSN values,
> which is normal.
> 
> But il this case slapd on B scans, at each startup, all objecs written on A
> after the write operation on B. 
> The log and the effect are similar to those explained above.
> 
> Should I consider this as a normal behaviour or a bug ?

There are no writes above, you've only shown searches. How many times do 
  you restart slapd and why?

> 
> My mirror configuration is similar to the one recommended in Admin's Guide.
> Of course I can provide more detailed information if required.
> 
> Thanks for your HELP
> Best Regards
> Ali
> 
> 


-- 
Kind Regards,

Gavin Henry.

T +44 (0) 1224 279484
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E ghenry@suretecsystems.com

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