openldap-technical November 2018

openldap-technical@openldap.org

24 participants
24 discussions

Resizing of LMDB map
by Daniel Kraft 12 Nov '18

12 Nov '18

Hi! I'm trying to use LMDB in a way that automatically resizes the map whenever it becomes too small, i.e. a function fails with MDB_MAP_FULL. I've created and attached a program that resembles my real usecase in a very simplified fashion: It just writes data to the database, and tries to double the map size whenever MDB_MAP_FULL is received. However, for me this program (as well as my real code) produces a segfault in the mdb_put call that follows after the first resize. What am I doing wrong here, and how can I correctly implement a resize when full? According to the docs [1], it is ok to call mdb_env_set_mapsize for an open environment as long as no transactions are active. My code ensures this by aborting the current transaction before resizing the map. Also, there seems to be other code out there [2] that does the resize in a way that looks like what I'm trying to do, and presumably works fine. [1] http://www.lmdb.tech/doc/group__mdb.html#gaa2506ec8dab3d969b0e609cd82e619e5 [2] https://github.com/BVLC/caffe/pull/3731 Yours, Daniel -- https://www.domob.eu/ OpenPGP: 1142 850E 6DFF 65BA 63D6 88A8 B249 2AC4 A733 0737 Namecoin: id/domob -> https://nameid.org/?name=domob -- 3.6.0: Bar-Pri-Ran-Rog-Sam-Val-Wiz To go: Arc-Cav-Hea-Kni-Mon-Tou -- https://www.domob.eu/ OpenPGP: 1142 850E 6DFF 65BA 63D6 88A8 B249 2AC4 A733 0737 Namecoin: id/domob -> https://nameid.org/?name=domob -- 3.6.0: Bar-Pri-Ran-Rog-Sam-Val-Wiz To go: Arc-Cav-Hea-Kni-Mon-Tou

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Re: Why built-in schemas are a bad idea
by Michael Ströder 12 Nov '18

12 Nov '18

On 11/12/18 11:27 AM, Ulrich Windl wrote: > So far nobody did comment of what I think is the real issue: I did. But obviously you did not like my answer. Ciao, Michael.

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syncrepl with exattrs
by Frank Swasey 08 Nov '18

08 Nov '18

I am attempting to set up a replication using delta-syncrepl that will ignore four objectClasses. I am able to prevent the attributes of those objectClasses from being sent, by using @objectClassName in the exattrs value of the statement. However, I also have to set schemachecking off because the objectClass: objectClassName value is still coming over. I was not able to find any examples of using the exattrs option in the tests/data directory. And, I have failed to find anything relevant from google. Is there a way to prevent the four possible objectClass values that I don't want to see from being sent so I can leave schemachecking turned on? Thanks, - Frank

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upgrade procedure
by BÖSCH Christian 06 Nov '18

06 Nov '18

Hi, What would be the best approach to upgrade a multimaster setup? Is it possible to stop node#1 (version 2.4.43), do the upgrade to 2.4.45 and then start the node again, let it replicate (does the version mismatch matter?), and afterwards do the same with node#2? Or is it better to build a fresh environment with the new version in parallel, get the data with slapcat/slapadd and switchover IPs? Thanks in advance, Christian

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openldap-technical November 2018