1SLAPO-SYNCPROV(5) File Formats Manual SLAPO-SYNCPROV(5)
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6 slapo-syncprov - Sync Provider overlay
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9 /etc/openldap/slapd.conf
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12 The Sync Provider overlay implements the provider-side support for the
13 LDAP Content Synchronization (RFC4533) as well as syncrepl replication
14 support. The overlay can be used with any backend that maintains
15 entryCSN and entryUUID attributes for its entries. It also creates a
16 contextCSN attribute in the root entry of the database.
17 The contextCSN is updated for every write operation performed against
19 the database. To reduce database contention, the contextCSN is only
20 updated in memory. The value is written to the database on server shut‐
21 down and read into memory on startup, and maintained in memory there‐
22 after. Checkpoints may be configured to write the contextCSN into the
23 underlying database to minimize recovery time after an unclean shut‐
24 down.
25 Note that due to deadlock constraints in the LDBM database, this over‐
27 lay will only work in RefreshOnly mode, and cannot perform checkpoints,
28 on LDBM.
29 On databases that support inequality indexing, it is helpful to set an
31 eq index on the entryCSN attribute when using this overlay.
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34 These slapd.conf options apply to the Sync Provider overlay. They
35 should appear after the overlay directive.
36 syncprov-checkpoint <ops> <minutes>
38 After a write operation has succeeded, write the contextCSN to
39 the underlying database if <ops> write operations or more than
40 <minutes> time have passed since the last checkpoint. Check‐
41 pointing is disabled by default.
42 syncprov-sessionlog <ops>
44 Specify a session log for recording information about write
45 operations made on the database. The <ops> specifies the number
46 of operations that are recorded in the log. All write operations
47 (except Adds) are recorded in the log. When using the session
48 log, it is helpful to set an eq index on the entryUUID attribute
49 in the underlying database.
50 syncprov-nopresent TRUE | FALSE
52 Specify that the Present phase of refreshing should be skipped.
53 This value should only be set TRUE for a syncprov instance on
54 top of a log database (such as one managed by the accesslog
55 overlay). The default is FALSE.
56 syncprov-reloadhint TRUE | FALSE
58 Specify that the overlay should honor the reloadHint flag in the
59 Sync Control. In OpenLDAP releases 2.3.11 and earlier the syn‐
60 crepl consumer did not properly set this flag, so the overlay
61 must ignore it. This option should be set TRUE when working with
62 newer releases that properly support this flag. It must be set
63 TRUE when using the accesslog overlay for delta-based syncrepl
64 support. The default is FALSE.
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67 /etc/openldap/slapd.conf
68 default slapd configuration file
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71 slapd.conf(5), slapo-accesslog(5). OpenLDAP Administrator's Guide.
72OpenLDAP 2.3.34 2007/2/16 SLAPO-SYNCPROV(5)