openldap-bugs September 2013

openldap-bugs@openldap.org

30 participants
114 discussions

(ITS#7703) mdb sync() issues vs. ACID
by h.b.furuseth＠usit.uio.no 21 Sep '13

21 Sep '13

Full_Name: Hallvard B Furuseth Version: LMDB_0.9.8 OS: URL: Submission from: (NULL) (81.191.45.35) Submitted by: hallvard mdb_env_sync() uses the wrong sync method when syncing a commit written with a different MDB_WRITEMAP setting in another MDB_env. Two processes with MDB_NOMETASYNC, each process doing every 2nd write txn, will sync each other's meta pages. If they have different MDB_WRITEMAPs, every meta page gets synced wrongly. This breaks durability of ACID. There is a similar problem if a process crashes after writing the meta page but before sync succeeds, and mdb_env_open() then resets the lockfile to refer to the unsynced commit. Robust mutexes will introduce a similar problem without mdb_env_open. I'm not volunteering to figure out how to do this right, e.g. how do fsync/msync/FlushFileBuffers work on various OSes if the file descriptor or memory map is read-only, do we need to set a "need to sync" flag in the lockfile in this case for the first writer or write txn to obey? Another fix: Disable this scenario. Store the MDB_WRITEMAP setting in the lockfile when resetting it, even with MDB_RDONLY. Obey that flag rather than the writemap flag to mdb_env_open() when not resetting the lockfile. However, now a small program like mdb_stat can have disproportionate effect on another process which opens the env at the same time. Also nested txns need to work with MDB_WRITEMAP. For the crash case above and robust mutexes: Maybe mdb_env_open() should not modify me_txns->mti_txnid if it refers to the oldest meta page. That way the possibly unsynced commit will never be exposed unless the lockfile is removed. But next write txn must then reset the "hidden" metapage and sync before proceeding, similar to how mdb_env_write_meta() does at failure. Otherwise removing the lockfile would expose a meta page referring to data which may have been overwritten, e.g. by an mdb_abort()ed commit. Another variant would be to sync in mdb_env_open() when resetting the lockfile, or maybe an MDB_RDONLY env must set a "sync needed" flag.

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(ITS#7702) hdb and mdb derefere aliases differently
by julien.combes＠i-carre.net 20 Sep '13

20 Sep '13

Full_Name: Julien COMBES Version: 2.4.36 OS: debian squeeze URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (212.23.175.188) Hello, With openldap 2.4.36, i found a case where the aliases are deref differently between hdb and mdb. A search with deref aliases on an attribut not indexed (or on "*"), mdb backend returns the entry twice where hdb backend returns the entry once. For example : With a directory like that : --------------------------------------------------------------------- dn: dc=test,dc=com objectClass: top objectClass: dcObject objectClass: organization dc: test o: test dn: ou=a,dc=test,dc=com objectClass: top objectClass: organizationalUnit ou: a dn: ou=b,ou=a,dc=test,dc=com objectClass: top objectClass: organizationalUnit ou: b dn: ou=c,ou=a,dc=test,dc=com objectClass: top objectClass: organizationalUnit ou: c dn: cn=foo,ou=b,ou=a,dc=test,dc=com objectClass: top objectClass: person cn: foo sn: foo dn: cn=bar,ou=c,ou=a,dc=test,dc=com objectClass: top objectClass: alias objectClass: extensibleObject aliasedObjectName: cn=foo,ou=b,ou=a,dc=test,dc=com cn: bar --------------------------------------------------------------------- I have that kind of result : -> Search on mdb, cn not indexed : $ ldapsearch -x -LLL -b "ou=a,dc=test,dc=com" cn=foo dn -a always dn: cn=foo,ou=b,ou=a,dc=test,dc=com dn: cn=foo,ou=b,ou=a,dc=test,dc=com $ ldapsearch -x -LLL -b "ou=a,dc=test,dc=com" cn=* dn -a always dn: cn=foo,ou=b,ou=a,dc=test,dc=com dn: cn=foo,ou=b,ou=a,dc=test,dc=com -> Search on mdb, cn indexed eq,sub : $ ldapsearch -x -LLL -b "ou=a,dc=test,dc=com" cn=foo dn -a always dn: cn=foo,ou=b,ou=a,dc=test,dc=com $ ldapsearch -x -LLL -b "ou=a,dc=test,dc=com" cn=* dn -a always dn: cn=foo,ou=b,ou=a,dc=test,dc=com dn: cn=foo,ou=b,ou=a,dc=test,dc=com -> Search on hdb, cn not indexed : $ ldapsearch -x -LLL -b "ou=a,dc=test,dc=com" cn=foo dn -a always dn: cn=foo,ou=b,ou=a,dc=test,dc=com $ ldapsearch -x -LLL -b "ou=a,dc=test,dc=com" cn=* dn -a always dn: cn=foo,ou=b,ou=a,dc=test,dc=com -> Search on hdb $ ldapsearch -x -LLL -b "ou=a,dc=test,dc=com" cn=foo dn -a always dn: cn=foo,ou=b,ou=a,dc=test,dc=commits $ ldapsearch -x -LLL -b "ou=a,dc=test,dc=com" cn=* dn -a always dn: cn=foo,ou=b,ou=a,dc=test,dc=com Regards, Julien COMBES P.S: I have first posted this message as a comment in ITS7577 the 25 Jul 2013. But as the ITS7577 is tagged closed and has no answers since this date, I decide to repost as a new report.

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(ITS#7701) Deletion triggers SEGV on next access of existing cursor
by dw＠botanicus.net 19 Sep '13

19 Sep '13

Full_Name: David Wilson Version: 919a0f5b54dad3acf2f84e7993bb00e7aa098037 OS: Linux URL: http://www.h1.botanicus.net/20130919-lmdb.trace.bz2 Submission from: (NULL) (178.238.153.20) In some circumstances LMDB will segfault in mdb_cursor_get() on a cursor that existed prior to a deletion that just occurred. It is apparently related to the page the cursor points to becoming mutated by the deletion. In LMDB 0.9.8, the issue may manifest as a NULL ptr dereference: #0 mdb_xcursor_init1 (mc=mc@entry=0x1013da0, node=node@entry=0x7ffd76031ac2) at lib/mdb.c:6525 #1 0x00007ffff5209b73 in mdb_cursor_next (mc=0x1013da0, key=0xce39a0, data=data@entry=0xce3660, op=<optimized out>) at lib/mdb.c:5042 #2 0x00007ffff5208a6e in mdb_cursor_get (mc=0x1013da0, key=0xce39a0, data=0xce3660, op=op@entry=MDB_NEXT) at lib/mdb.c:5526 #3 0x00007ffff5202a83 in _cffi_f_mdb_cursor_get (self=<optimized out>, args=<optimized out>) at lmdb/__pycache__/lmdb_cffi.c:714 #4 0x0000000000471a8b in call_function (oparg=<optimized out>, pp_stack=0x7fffffffcf30) at ../Python/ceval.c:4021 #5 PyEval_EvalFrameEx ( Due to F_DUPDATA bit being set as tested on line 5041. Examining the leaf structure reveals a large chunk of ASCII text (which should have been written to the DB), interspersed with some integer values. Versions of LMDB <= 0.9.7 exhibit similar crashes, although in a different place: "assert(mc)" at the start of mdb_cursor_get(). Various MDB versions going back 6 months were tested, and none exhibited any better behaviour. In the attached trace/replay, version c0575825730dd2aab4031100b25d632a3d052447 from April exhibited the bug after only 1993 operations executed from the trace file. Any more recent version requires the entire trace file to execute before triggering the assert or SEGV. http://www.h1.botanicus.net/20130919-lmdb.trace.bz2 is a 33MiB trace file that can be loaded and executed using https://github.com/dw/acid/blob/master/misc/lmdb-replay.c The apparent workaround is to reinitialize any existing cursors should a deletion occur within a transaction, as demonstrated in https://github.com/dw/acid/commit/56f183c71a668e540df58d5137e946616a446c49

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(ITS#7700) DOC: OL AdminGuide not updated
by marco.pizzoli＠gmail.com 19 Sep '13

19 Sep '13

Full_Name: Marco Pizzoli Version: ALL OS: N/A URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (194.11.209.11) I notice that in the online Admin Guide the syncrepl directive is not updated with the recent addition of "keepalive" and "network-timeout" parameters.

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(ITS#7699) Fixed one assertion failure during slapo_dds start-up
by tedcheng＠symas.com 18 Sep '13

18 Sep '13

Full_Name: Ted C. Cheng Version: HEAD OS: Ubuntu 11.10 URL: https://www.dropbox.com/s/kw5df5z1oxm3hw2/slapo_dds_start_up_assertion_fix.… Submission from: (NULL) (172.250.77.154) dds_db_open() did not enumerate dynamic objects before slapo-dds performed expiration check and purging. As a result, the assert(di->di_num_dynamicObjects > 0) at dds_counter_cb() may crash. The proposed resolution is to move dds_count() before dds_expire(). Please review. Thanks,

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AW: (ITS#7655) segfault during initial mirror of multimaster delta replication
by hans.freitag＠entiretec.com 18 Sep '13

18 Sep '13

Hi, unfortunately i was not able to reproduce the exact problem with the segfault, but, after a few updates, we still have the problem that with replication enabled the slapd freezes during a write operation. SETUP DESCRIPTION: Openldap Version 2.4.36 Back-MDB (we have issues for quite a while, even when we where running on bdb) All write and read requests are directed to the active node, so the passive node is replicating. So, if I did not understand something wrong I have two threads: The main thread, and the one which is doing the replication. Netstat of TCP Replication connections, the second is initiated by the passive system polling from the active tcp 0 53 10.169.127.13:389 10.169.126.13:43340 ESTABLISHED tcp 1905336 0 10.169.127.13:52384 10.169.126.13:389 ESTABLISHED top -H of the LDAP Processes: 7767 ldap 20 0 84.4g 7.1g 6.9g S 1 10.1 1:02.13 slapd 7768 ldap 20 0 84.4g 7.1g 6.9g S 0 10.1 7:54.44 slapd 8023 ldap 20 0 84.4g 7.1g 6.9g S 0 10.1 0:32.31 slapd 7766 ldap 20 0 84.4g 7.1g 6.9g S 0 10.1 0:00.00 slapd 7769 ldap 20 0 84.4g 7.1g 6.9g S 0 10.1 0:32.81 slapd 7770 ldap 20 0 84.4g 7.1g 6.9g S 0 10.1 7:44.94 slapd 8024 ldap 20 0 84.4g 7.1g 6.9g t 0 10.1 0:32.53 slapd PASTEBIN: I Pastebinned all the backtraces to: http://pastebin.com/vVGEqEUt I hope this helps to track back the problem. Kind regards - Mit freundlichen Grüßen i.A. Hans Freitag » Linux Administrator ENTIRETEC AG . Pforzheimer Strasse 33 . 01189 Dresden . Germany T: +49.351.41355.0 . M: . F: +49.351.41355.99 E: hans.freitag(a)entiretec.com ENTIRETEC | http://www.entiretec.com Germany | Switzerland | United Arab Emirates | Malaysia | United States of America ENTIRETEC AG Vorstand: Thomas Herrmann (Vorsitzender), Thomas Wetzel, Carsten Klemm . Aufsichtsratsvorsitzende: Dr. Jutta Horezky Sitz der Gesellschaft: Dresden . Amtsgericht Dresden HRB 24915 . USt-IdNr. DE227705033 > -----Ursprüngliche Nachricht----- > Von: openldap-bugs-bounces(a)OpenLDAP.org [mailto:openldap-bugs- > bounces(a)OpenLDAP.org] Im Auftrag von quanah(a)zimbra.com > Gesendet: Montag, 5. August 2013 05:15 > An: openldap-its(a)openldap.org > Betreff: Re: (ITS#7655) segfault during initial mirror of multimaster > delta replication > > --On Sunday, August 04, 2013 4:27 PM +0000 hans.freitag(a)entiretec.com > wrote: > > > Full_Name: Hans Freitag > > Version: 2.4.35 and 33 > > OS: SLES 11SP2 > > URL: ftp://ftp.openldap.org/incoming/ > > Submission from: (NULL) (193.200.138.3) > > > > > > I have a Multimaster Delta replication setup here with bdb on a 18 GB > > Database. > > > > After a crash due to a full disk I made a new database on one node > ans > > started over. > > > > The empty node started to replicate, from the full one but after a > while > > (approx. 2GB) it crashed with a segfault: > > > > Aug 4 11:45:32 mhr-dd-lda-01 kernel: [52189.476209] slapd[10158]: > > segfault at 20 ip 00007ff97ebfabc0 sp 00007ff6e57e6b38 error 4 in > > libc-2.11.1.so[7ff97eb79000+155000] > > > > So i thought, maybe it is not e good Idea to put in a package for SP2 > in a > > machine running SP1 so my first attempt to solve was an upgrade. > After the > > upgrade I got this: > > > > Aug 4 12:46:29 mhr-dd-lda-01 kernel: [ 1414.757587] slapd[3704]: > > segfault at 20 ip 00007fc82eee6182 sp 00007fc592e0acf0 error 4 in > > slapd[7fc82ee7a000+1e6000] > > > > So I created a brandnew openldap RPM 2.4.35 rpm to try out if the > problem > > is maybe related to the 2.4.33 version I am running. But fail: > > > > Aug 4 13:47:19 mhr-dd-lda-01 kernel: [ 5063.074410] slapd[8749]: > > segfault at 20 ip 00007fcbc1b537dc sp 00007fc92624fb88 error 4 in > > slapd[7fcbc1ac8000+1ea000] > > > > At the moment I deactivated the accesslogging on the node which seems > to > > work. I will know for sure in a few hours. ;-) I can try to reproduce > > that on a backup node next week. Whenn all the main nodes are up and > > running again. :) > > I would suggest you build with debugging symbols, enable core files, > and > provide a backtrace of the problem. What you have provided does not > give > any useful information for debugging purposes. You also fail to state > the > backend you are using (back-bdb or back-hdb). > > For information on how to provide a backtrace: > > <http://www.openldap.org/faq/data/cache/59.html> > > Regards, > Quanah > > -- > > Quanah Gibson-Mount > Lead Engineer > Zimbra, Inc > -------------------- > Zimbra :: the leader in open source messaging and collaboration >

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Re: (ITS#7698) Multiple Paged search requests on one connection fail
by michael＠stroeder.com 17 Sep '13

17 Sep '13

This is a cryptographically signed message in MIME format. --------------ms070508090701020005010904 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable john.unsworth(a)cp.net wrote: > AFAIK it is not the standard LDAP changelog - let me know if I'm wrong.= We > don't want to write specific code for each LDAP server that doesn't con= form > to the LDAP (draft I know) standard. I presume you're referring to [1] as "the standard LDAP changelog". Note that this is an expired informational Internet draft and not a propo= sed standard. Ciao, Michael. [1] https://tools.ietf.org/html/draft-good-ldap-changelog-04 --------------ms070508090701020005010904 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIFfzCC BXswggNjoAMCAQICAwxOfTANBgkqhkiG9w0BAQUFADB5MRAwDgYDVQQKEwdSb290IENBMR4w HAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNBIENlcnQgU2lnbmlu ZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRAY2FjZXJ0Lm9yZzAeFw0xMjEw MDIyMDE3MDlaFw0xNDEwMDIyMDE3MDlaMD8xGDAWBgNVBAMUD01pY2hhZWwgU3Ry9mRlcjEj MCEGCSqGSIb3DQEJARYUbWljaGFlbEBzdHJvZWRlci5jb20wggEiMA0GCSqGSIb3DQEBAQUA A4IBDwAwggEKAoIBAQDo2SKth5GhtaDrCyfGtyUG+/hAAa/J52L0NFN4SSRvTtdGf9HfWwwd NCtgae0TVGWk2lKDbXA9d5vmyIiRhuwxd90H6FLErhRBeB9G67qtw87E8WUoXt2DwPQEUTWV hqHpPadlmgFw3+i3TGQQTe3O3W9MMMd4GJNhObem2VGRuCD37OXnzBksTcq0FPJgcWAhe3d/ 0ItOkNWBqgq8Mf3p7WFBhaQ0a27BC/mKtH8fI3kPcS305imPRja69Msq3EwUZBc9ToVp6FRQ NYKjfOBybDUzVkmRZl3H8xutQP2w8Zxb8m5f7Q1BfLLrIFScfYvIDgOERxTCd4lab8+/09XH AgMBAAGjggFEMIIBQDAMBgNVHRMBAf8EAjAAMFYGCWCGSAGG+EIBDQRJFkdUbyBnZXQgeW91 ciBvd24gY2VydGlmaWNhdGUgZm9yIEZSRUUgaGVhZCBvdmVyIHRvIGh0dHA6Ly93d3cuQ0Fj ZXJ0Lm9yZzAOBgNVHQ8BAf8EBAMCA6gwQAYDVR0lBDkwNwYIKwYBBQUHAwQGCCsGAQUFBwMC BgorBgEEAYI3CgMEBgorBgEEAYI3CgMDBglghkgBhvhCBAEwMgYIKwYBBQUHAQEEJjAkMCIG CCsGAQUFBzABhhZodHRwOi8vb2NzcC5jYWNlcnQub3JnMDEGA1UdHwQqMCgwJqAkoCKGIGh0 dHA6Ly9jcmwuY2FjZXJ0Lm9yZy9yZXZva2UuY3JsMB8GA1UdEQQYMBaBFG1pY2hhZWxAc3Ry b2VkZXIuY29tMA0GCSqGSIb3DQEBBQUAA4ICAQC9ouXq3p/bDWMM4tBKgD3tl4HY5H0eECl8 q9/nqk0UL6YeWkrCiQdrDtNPW7DcGqNYtzdgtzmyTr1GhiAX+igrOjdk/ge5NRcQOpONK/4b zrmpQEcIUyxSSDKLWh211/kcFfxxLEiJ5teF4GL8Fc1qbrLP4+DCvJXWfYaaR5NLjZMqm2VP yKTv3qpXWnGohiRkGTwS/11QM2XCfIGdRsQT9a8mO4m2fn2tGPp2TEIoCLrDDrbGVeDWaOWB OIeTrp4wa3Q4OI6yCptJhEqKvjhV96IBRYgM76nTBqsqnDzwxExAyhhWiUS5DunRHOr/+NyF pUpD4883RBLO0g9kUEGOhtZNF1u+8zEL0YgMGvifAom9JEklLOXZuqj0MThypKs/3d/OyOQb 4gURnu6oZwcKZ7LskytWnlRKUxF6o0A8grtmyKkqe14TS7cQbg0NTaIYXPkHR+dfFmb3uEqn BBjvpJXFcEtWI2lQXC/ET+au991pK797ExBOmpQwjIn3SjiW80vw/UoL6DMvqY/6JhVhyNTP MJ2W5AX5kc27DIbVtVGZs8J4AYhuNALJUq9N9Ka7rPRj3RcYDrfehDLOkM5iMnarpmtuOpLK d1SvZhqj/0N/JWGIDpPSTkTFOPP6ZN9I9Rqyf+9NGqb2sjo4DkIiZcHxt735/GJLwus5KLBl 2DGCA6EwggOdAgEBMIGAMHkxEDAOBgNVBAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93 d3cuY2FjZXJ0Lm9yZzEiMCAGA1UEAxMZQ0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEhMB8G CSqGSIb3DQEJARYSc3VwcG9ydEBjYWNlcnQub3JnAgMMTn0wCQYFKw4DAhoFAKCCAfUwGAYJ KoZIhvcNAQkDMQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMTMwOTE3MjA0MjUzWjAj BgkqhkiG9w0BCQQxFgQUEAusugl++MhH733peKnCHcb/Nw4wbAYJKoZIhvcNAQkPMV8wXTAL BglghkgBZQMEASowCwYJYIZIAWUDBAECMAoGCCqGSIb3DQMHMA4GCCqGSIb3DQMCAgIAgDAN BggqhkiG9w0DAgIBQDAHBgUrDgMCBzANBggqhkiG9w0DAgIBKDCBkQYJKwYBBAGCNxAEMYGD MIGAMHkxEDAOBgNVBAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93d3cuY2FjZXJ0Lm9y ZzEiMCAGA1UEAxMZQ0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEhMB8GCSqGSIb3DQEJARYS c3VwcG9ydEBjYWNlcnQub3JnAgMMTn0wgZMGCyqGSIb3DQEJEAILMYGDoIGAMHkxEDAOBgNV BAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93d3cuY2FjZXJ0Lm9yZzEiMCAGA1UEAxMZ Q0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEhMB8GCSqGSIb3DQEJARYSc3VwcG9ydEBjYWNl cnQub3JnAgMMTn0wDQYJKoZIhvcNAQEBBQAEggEAq+P94yAbnCHzS4eSmCAnZ9HB/kitBw++ I3EWNu3OZ+bYst3YHAtwjDLZyHZOy7YreSiznixIR73sM6ZFZji1L11chKnoQyhnb48bOFHC Mc3tY7iR15KZc2kzahw33XfvHv4XKuXNKdFqBbqMJdgSoZ6b9WCKp3vJhi0CexuH64WeJ+iX ZUbOAhkZ9AiSLaK9Ra2wHksEXJvmzexPCM8LnEGbUFbUtf5sVp8lJw/gq4FSSdcQt1GHyw3z AioPL4aqaFm7h6/if7qR0AAMV/W4ssrJvnv7gSNyZWS/FeKn16TU61hZZ9Z5ZenKUnarTYuj tgXfQHxjsQlS3f0R78wU9gAAAAAAAA== --------------ms070508090701020005010904--

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Re: (ITS#7698) Multiple Paged search requests on one connection fail
by michael＠stroeder.com 17 Sep '13

17 Sep '13

This is a cryptographically signed message in MIME format. --------------ms080203050507020908040705 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable John Unsworth wrote: > LDAP servers we connect to typically contain > thousands if not millions of entries. Reading the lot without paging - > although we can do it - is very inefficient both in terms of LDAP resou= rces > and application resources. I really wonder why that is inefficient. I'm also developing custom sync software for large data sets. If stream processing is possible you don't = need much resources. If stream processing is not possible paging does not help= either. > In the case of OpenLDAP there is no LDAP changelog and so the only way = we > have of discovering changes is to read the whole directory and compare = with > what was read last time. Use slapo-accesslog which is more powerful than the old changelog data an= yway. Ciao, Michael. --------------ms080203050507020908040705 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIFfzCC BXswggNjoAMCAQICAwxOfTANBgkqhkiG9w0BAQUFADB5MRAwDgYDVQQKEwdSb290IENBMR4w HAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNBIENlcnQgU2lnbmlu ZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRAY2FjZXJ0Lm9yZzAeFw0xMjEw MDIyMDE3MDlaFw0xNDEwMDIyMDE3MDlaMD8xGDAWBgNVBAMUD01pY2hhZWwgU3Ry9mRlcjEj MCEGCSqGSIb3DQEJARYUbWljaGFlbEBzdHJvZWRlci5jb20wggEiMA0GCSqGSIb3DQEBAQUA A4IBDwAwggEKAoIBAQDo2SKth5GhtaDrCyfGtyUG+/hAAa/J52L0NFN4SSRvTtdGf9HfWwwd NCtgae0TVGWk2lKDbXA9d5vmyIiRhuwxd90H6FLErhRBeB9G67qtw87E8WUoXt2DwPQEUTWV hqHpPadlmgFw3+i3TGQQTe3O3W9MMMd4GJNhObem2VGRuCD37OXnzBksTcq0FPJgcWAhe3d/ 0ItOkNWBqgq8Mf3p7WFBhaQ0a27BC/mKtH8fI3kPcS305imPRja69Msq3EwUZBc9ToVp6FRQ NYKjfOBybDUzVkmRZl3H8xutQP2w8Zxb8m5f7Q1BfLLrIFScfYvIDgOERxTCd4lab8+/09XH AgMBAAGjggFEMIIBQDAMBgNVHRMBAf8EAjAAMFYGCWCGSAGG+EIBDQRJFkdUbyBnZXQgeW91 ciBvd24gY2VydGlmaWNhdGUgZm9yIEZSRUUgaGVhZCBvdmVyIHRvIGh0dHA6Ly93d3cuQ0Fj ZXJ0Lm9yZzAOBgNVHQ8BAf8EBAMCA6gwQAYDVR0lBDkwNwYIKwYBBQUHAwQGCCsGAQUFBwMC BgorBgEEAYI3CgMEBgorBgEEAYI3CgMDBglghkgBhvhCBAEwMgYIKwYBBQUHAQEEJjAkMCIG CCsGAQUFBzABhhZodHRwOi8vb2NzcC5jYWNlcnQub3JnMDEGA1UdHwQqMCgwJqAkoCKGIGh0 dHA6Ly9jcmwuY2FjZXJ0Lm9yZy9yZXZva2UuY3JsMB8GA1UdEQQYMBaBFG1pY2hhZWxAc3Ry b2VkZXIuY29tMA0GCSqGSIb3DQEBBQUAA4ICAQC9ouXq3p/bDWMM4tBKgD3tl4HY5H0eECl8 q9/nqk0UL6YeWkrCiQdrDtNPW7DcGqNYtzdgtzmyTr1GhiAX+igrOjdk/ge5NRcQOpONK/4b zrmpQEcIUyxSSDKLWh211/kcFfxxLEiJ5teF4GL8Fc1qbrLP4+DCvJXWfYaaR5NLjZMqm2VP yKTv3qpXWnGohiRkGTwS/11QM2XCfIGdRsQT9a8mO4m2fn2tGPp2TEIoCLrDDrbGVeDWaOWB OIeTrp4wa3Q4OI6yCptJhEqKvjhV96IBRYgM76nTBqsqnDzwxExAyhhWiUS5DunRHOr/+NyF pUpD4883RBLO0g9kUEGOhtZNF1u+8zEL0YgMGvifAom9JEklLOXZuqj0MThypKs/3d/OyOQb 4gURnu6oZwcKZ7LskytWnlRKUxF6o0A8grtmyKkqe14TS7cQbg0NTaIYXPkHR+dfFmb3uEqn BBjvpJXFcEtWI2lQXC/ET+au991pK797ExBOmpQwjIn3SjiW80vw/UoL6DMvqY/6JhVhyNTP MJ2W5AX5kc27DIbVtVGZs8J4AYhuNALJUq9N9Ka7rPRj3RcYDrfehDLOkM5iMnarpmtuOpLK d1SvZhqj/0N/JWGIDpPSTkTFOPP6ZN9I9Rqyf+9NGqb2sjo4DkIiZcHxt735/GJLwus5KLBl 2DGCA6EwggOdAgEBMIGAMHkxEDAOBgNVBAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93 d3cuY2FjZXJ0Lm9yZzEiMCAGA1UEAxMZQ0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEhMB8G CSqGSIb3DQEJARYSc3VwcG9ydEBjYWNlcnQub3JnAgMMTn0wCQYFKw4DAhoFAKCCAfUwGAYJ KoZIhvcNAQkDMQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMTMwOTE3MjAzNzMzWjAj BgkqhkiG9w0BCQQxFgQUTyl3bIAh895kSiYoIfJPfdrRbiowbAYJKoZIhvcNAQkPMV8wXTAL BglghkgBZQMEASowCwYJYIZIAWUDBAECMAoGCCqGSIb3DQMHMA4GCCqGSIb3DQMCAgIAgDAN BggqhkiG9w0DAgIBQDAHBgUrDgMCBzANBggqhkiG9w0DAgIBKDCBkQYJKwYBBAGCNxAEMYGD MIGAMHkxEDAOBgNVBAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93d3cuY2FjZXJ0Lm9y ZzEiMCAGA1UEAxMZQ0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEhMB8GCSqGSIb3DQEJARYS c3VwcG9ydEBjYWNlcnQub3JnAgMMTn0wgZMGCyqGSIb3DQEJEAILMYGDoIGAMHkxEDAOBgNV BAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93d3cuY2FjZXJ0Lm9yZzEiMCAGA1UEAxMZ Q0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEhMB8GCSqGSIb3DQEJARYSc3VwcG9ydEBjYWNl cnQub3JnAgMMTn0wDQYJKoZIhvcNAQEBBQAEggEAm42W7q1EMPcgUQ8jMD560Ml8344oCv8m JeaMH+6k1GjWDfqQkX3qPj2gGbqw27JfHs7lEjMqedyXdFcK0LokVzCsRxbjTwseaq4JX0gl llgHDa/fwF1Et+dcCMFaMMeyo+zeNUnLq46iVhrROtGov67iYKqO7/y0O+YSdVR7z9G2amby nqlxCZhK9gr1IlGHe3hXkWiTIR8ud/6jVLYGhiKS2n8ctpltD2EoJslJFA1Vy7FOPF4ecoN7 IbB6egUHRjsNPp1BO294jPnlLLkLeD/CXrCl7RAEhpVDPeY51nnI8p3isUgqcmO0LR6+f+/j nyHAskCnziCmuzD93wWv5gAAAAAAAA== --------------ms080203050507020908040705--

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Re: (ITS#7698) Multiple Paged search requests on one connection fail
by hyc＠symas.com 17 Sep '13

17 Sep '13

quanah(a)zimbra.com wrote: > --On Tuesday, September 17, 2013 7:52 PM +0000 john.unsworth(a)cp.net wrote: > >> AFAIK it is not the standard LDAP changelog - let me know if I'm wrong. We >> don't want to write specific code for each LDAP server that doesn't >> conform to the LDAP (draft I know) standard. > > Please fix your client to stop top-posting. > > With openldap, you have two choices. I don't know which draft you are > referring to, so I can't say if either conforms with what the other > directory servers do. > > slapo-auditlog > slapo-accesslog accesslog conforms to this draft: http://tools.ietf.org/html/draft-chu-ldap-logschema-00 -- -- Howard Chu CTO, Symas Corp. http://www.symas.com Director, Highland Sun http://highlandsun.com/hyc/ Chief Architect, OpenLDAP http://www.openldap.org/project/

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Re: (ITS#7698) Multiple Paged search requests on one connection fail
by hyc＠symas.com 17 Sep '13

17 Sep '13

John Unsworth wrote: >>> There are no other directory servers in existence that can scale to the > level that OpenLDAP does and perform well at that scale. > > How do you justify/prove that statement? Our (Symas) customers tell us which directory server they're migrating from when they come to us. We perform benchmarks periodically as well. Nothing else comes close. Come to LDAPCon this year, we'll be presenting our latest benchmark results then. > -----Original Message----- > From: Howard Chu [mailto:hyc@symas.com] > Sent: 17 September 2013 20:52 > To: john.unsworth(a)cp.net; openldap-its(a)openldap.org > Subject: Re: (ITS#7698) Multiple Paged search requests on one connection > fail > > john.unsworth(a)cp.net wrote: >> Products other than browsers use LDAP servers. Our product is a meta >> directory that watches for changes on multiple data sources (LDAP, >> Databases, SAP, ...) and reconciles any changes across the complete >> set of sources according to data filtering and transformation rules. >> However sometimes it is necessary to read the whole data set - for >> example when a new data server is added, or when changes may have been >> missed for any reason, or when an 'audit' type operation is required >> to ensure that all data sources are consistent. LDAP servers we >> connect to typically contain thousands if not millions of entries. > > OpenLDAP is regularly used in production by large telcos with billions of > entries. There are no other directory servers in existence that can scale to > the level that OpenLDAP does and perform well at that scale. > >> Reading the lot without paging - >> although we can do it - is very inefficient both in terms of LDAP >> resources and application resources. > > That's utter nonsense. The amount of data is the same no matter how many > pieces you slice it into. It is *more* inefficient to slice it into multiple > requests. > >> The directory is read using multiple parallel paged searches across >> different branches on a single connection. Every directory we have >> used except OpenLDAP can manage this effectively. > >> In the case of OpenLDAP there is no LDAP changelog and so the only way >> we have of discovering changes is to read the whole directory and >> compare with what was read last time. > > So you're saying you're connecting to OpenLDAP servers from version 2.1 or > older, from before syncrepl or the accesslog or changelog overlays existed. > >> -----Original Message----- >> From: Michael Ströder [mailto:michael@stroeder.com] >> Sent: 17 September 2013 20:20 >> To: john.unsworth(a)cp.net; openldap-its(a)openldap.org >> Subject: Re: (ITS#7698) Multiple Paged search requests on one >> connection fail >> >> john.unsworth(a)cp.net wrote: >>> I would also be interested to understand why " paged results is >>> inherently flawed". >> >> Although being the author of an interactive LDAP UI client I still >> wonder why people want paged results (or tree browsing). >> >> If you have so many results you should narrow the search criteria. >> Browsing/paging is pretty inefficient working style. >> >> Ciao, Michael. >> >> >> >> >> > > -- -- Howard Chu CTO, Symas Corp. http://www.symas.com Director, Highland Sun http://highlandsun.com/hyc/ Chief Architect, OpenLDAP http://www.openldap.org/project/

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openldap-bugs September 2013