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* Upgraded to Berkeley DB 4.2.52. The main advantage of 4.2 is that

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it automatically removes log files when they are no longer needed.

  *** IMPORTANT ***

  If you have an existing Nix installation, you must checkpoint the
  Nix database to prevent recent transactions from being undone.  Do
  the following:

  - optional: make a backup of $prefix/var/nix/db.

  - run `db_checkpoint' from Berkeley DB 4.1:
  
    $ db_checkpoint -h $prefix/var/nix/db -1

  - optional (?): run `db_recover' from Berkeley DB 4.1:

    $ db_recover -h $prefix/var/nix/db

  - remove $prefix/var/nix/db/log* and $prefix/var/nix/db/__db*
This commit is contained in:
Eelco Dolstra 2004-01-07 15:53:14 +00:00
parent abe8c8c2aa
commit 7959354379
2 changed files with 7 additions and 6 deletions
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2
src/libstore/db.cc
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@ -160,7 +160,7 @@ void Database::open(const string & path)
env->set_lg_bsize(32 * 1024); /* default */
env->set_lg_max(256 * 1024); /* must be > 4 * lg_bsize */
env->set_lk_detect(DB_LOCK_DEFAULT);
env->set_flags(DB_TXN_WRITE_NOSYNC, 1);
env->set_flags(DB_TXN_WRITE_NOSYNC | DB_LOG_AUTOREMOVE, 1);
/* The following code provides automatic recovery of the