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d895f43504
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Ronnie Sahlberg d895f43504 cleanup of the previous patch. 
With these patches, ctdbd will enforce and (by default) always use
tdb_transactions when updating/writing records to a persistent database.

This might come with a small performance degratation  since transactions
are slower than no transactions at all.

If a client, such as samba wants to use a persistent database but does NOT
want to pay the performance penalty, it can specify TDB_NOSYNC  as the
srvid parameter in the ctdb_control() for CTDB_CONTROL_DB_ATTACH_PERSISTENT.

In this case CTDBD will remember that "this database is not that important"
so I can use unsafe (no transaction) tdb_stores to write the updates.
It will be faster than the default (always use transaction) but less crash safe.

(This used to be ctdb commit 3d85d2cf669686f89cacdc481eaa97aef1ba62c0)
2008-05-22 13:12:53 +10:00
ctdb cleanup of the previous patch. 2008-05-22 13:12:53 +10:00