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Maintaining Novell eDirectory
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The smallest tested cache size is 0 and the largest is 2.5 GB. Determining the proper cache size
depends on the memory needs of other processes running on the same server, and on the amount of
disk cache required. You should test a variety of cache sizes to find a good balance.
To optimize the bulkload performance, allocate a higher percentage of the eDirectory cache for
block cache. We recommend setting a value of 90%. This can be reset after the operation is
completed.
Using iMonitor is the quickest way to modify the blockcachepercentage parameter. To do so, follow
the instructions in
“Using Novell iMonitor 2.4” on page 197
.
For more details refer to the section on “Tuning the cache subsystem” in the
Novell
®
eDirectory
8.7.1:Performance Tuning for Linux* and UNIX*
(http://www.novell.com/collateral/4621373/
4621373.pdf)
.
18.5.2 LBURP Transaction Size Setting
The LBURP transaction size sets the number of records that are sent from ICE to the LDAP server
during a single transaction. Increasing this value can improve bulkload performance, assuming that
you have adequate memory and that the increase does not cause I/O contention.
The default transaction size is 25, which is appropriate for small LDIF files (fewer than 100,000
operations) but not for a large number of records. The LBURP transaction size can be set between 1
and 350.
Modifying the Transaction Size
To modify the transaction size, modify the required value for the n4u.ldap.lburp.transize parameter
in
/etc/opt/novell/eDirectory/conf/nds.conf
. In ideal scenarios, a higher
transaction size ensures faster performance. However, the transaction size must not be set to
arbitrarily high values for the following reasons:
A larger transaction size requires the server to allocate more memory to process the transaction.
If the system is running low on memory, this can cause a slowdown due to swapping.
The LDIF file should be free of errors and any entries already existing in eDirectory should be
commented out. Even if a single error exists in the transaction (including cases where the object
to be added already exists in the directory), eDirectory ignores the LBURP transaction setting
and performs a commit after each operation to ensure data integrity.
See “
Debugging LDIF Files
” for more information.
LBURP optimization works only for leaf objects. If the transaction contains both a container
and its subordinate objects, eDirectory treats this as an error. To avoid this, we recommend
loading the container objects first using a separate LDIF file or enables the use of forward
references.
See “
Enabling Forward References
” in the
Novell eDirectory 8.8 Troubleshooting Guide
for
more information.
18.5.3 Increasing the Number of Asynchronous Requests in
ICE
This refers to the number of entries the ICE client can send to the LDAP server asynchronously
before waiting for any result back from the server.
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