We run 'backward' recovery and 'forward recovery' on the item we turn around on, so do not set 'forward saw checkpoint begin' state
till we're in forward recovery.

git-svn-id: file:///svn/toku/tokudb@15849 c7de825b-a66e-492c-adef-691d508d4ae1

Added missing state transaction (turn around on checkpoint begin with no transactions)
Added error checking for unlink (anything but 0/ENOENT is real error)

Changes due to code review with Barry

git-svn-id: file:///svn/toku/tokudb@15848 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb@15847 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb@15845 c7de825b-a66e-492c-adef-691d508d4ae1

 * Before 'checkpoint begin'
  * fcreate
   * Will not create (treated as fopen)
   * Will not delete file
   * Will force rollback entry of fcreate (if file exists)
 * After checkpoint begin
  * fcreate
   * Will create
   * Will first delete file
   * Will force rollback entry of fcreate (if file exists)



git-svn-id: file:///svn/toku/tokudb@15844 c7de825b-a66e-492c-adef-691d508d4ae1

Closes #2180 closes[t:2180] Recovery forces 'fcreate' in rollback log (when replaying fcreate log entry)

git-svn-id: file:///svn/toku/tokudb@15841 c7de825b-a66e-492c-adef-691d508d4ae1

Addresses #652, #2170, #2178 refs[t:652,2170,2178] Merge from 3.0.0-logging branch with command: svn merge -r15784:HEAD https://svn.tokutek.com/tokudb/mysql.branches/3.0.0-logging/tokudb .

git-svn-id: file:///svn/toku/tokudb@15839 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb@15830 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb@15826 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb@15815 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb@15814 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb@15805 c7de825b-a66e-492c-adef-691d508d4ae1

Was not holding cachetable lock to access rwlock (whose mutex was cachetable lock).
This caused a race condition that you would sometimes grab the cachetable lock on exiting the lock but didn't have it before.

We believe this caused the deadlock

git-svn-id: file:///svn/toku/tokudb@15802 c7de825b-a66e-492c-adef-691d508d4ae1

Closes #2171 refs[t:2171] Add version info to persistent environment, create hook for environment update.

git-svn-id: file:///svn/toku/tokudb@15795 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb@15775 c7de825b-a66e-492c-adef-691d508d4ae1

i.e. only queries

git-svn-id: file:///svn/toku/tokudb.2037b@15766 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb.2037b@15764 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb.2037b@15759 c7de825b-a66e-492c-adef-691d508d4ae1

Checkpoint holds entire brt open (as zombie if necessary) instead of just holding open the cachefile.

git-svn-id: file:///svn/toku/tokudb.2037b@15740 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb.2037b@15739 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb.2037b@15737 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb.2037b@15723 c7de825b-a66e-492c-adef-691d508d4ae1

fopen forward recovery: file missing (ENOENT) is not considered an error.

git-svn-id: file:///svn/toku/tokudb.2037b@15693 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb.2037b@15692 c7de825b-a66e-492c-adef-691d508d4ae1

Closes #2153 refs[t:2153] fopen logged only once (unless closed and reopened).  Removed logger from cachefile_close,
removed txnid from logging of fopen.

git-svn-id: file:///svn/toku/tokudb.2037b@15691 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb.2037b@15681 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb.2037b@15678 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb.2037b@15677 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb.2037b@15676 c7de825b-a66e-492c-adef-691d508d4ae1

Addresses #2120 refs[t:2120] Internally created child transactions now copy parent's isolation level

git-svn-id: file:///svn/toku/tokudb.2037b@15675 c7de825b-a66e-492c-adef-691d508d4ae1

Ydb lock was not being grabbed due to confusion with conditional compiling.
YDB lock is now taken/released if the fair scheduling code is not active

git-svn-id: file:///svn/toku/tokudb.2037b@15674 c7de825b-a66e-492c-adef-691d508d4ae1

Closes #2120 closes[t:2120] Enforce that child transactions have same isolation level as parent's txn

git-svn-id: file:///svn/toku/tokudb.2037b@15672 c7de825b-a66e-492c-adef-691d508d4ae1

ENV->db(rename|remove) to prevent race conditions in the future.

git-svn-id: file:///svn/toku/tokudb.2037b@15658 c7de825b-a66e-492c-adef-691d508d4ae1

Addresses #2037 refs[t:2037] Added comments on transactional fileops tests, minor changes from code review.

git-svn-id: file:///svn/toku/tokudb.2037b@15657 c7de825b-a66e-492c-adef-691d508d4ae1

Addresses #2075 refs[t:2075] Give all ydb-level test programs the ability to print engine status (when verbose).

git-svn-id: file:///svn/toku/tokudb.2037b@15654 c7de825b-a66e-492c-adef-691d508d4ae1

git-svn-id: file:///svn/toku/tokudb.2037b@15647 c7de825b-a66e-492c-adef-691d508d4ae1

Use filenum provided.

git-svn-id: file:///svn/toku/tokudb.2037b@15646 c7de825b-a66e-492c-adef-691d508d4ae1

We reserve a filenum before logging, and then use the reserved filenum when we actually open the cachefile.

git-svn-id: file:///svn/toku/tokudb.2037b@15645 c7de825b-a66e-492c-adef-691d508d4ae1

Merge 2.2.0 scheduling statistics to 3.0.0 (#2075).
Restore #2094 fix to 3.0.0 (cachefiles_lock).
Command line for merge (executed in tokudb.2037b, ../tokudb.2.2.0 is local sandbox image of 2.2.0 release): svn merge -r14900:HEAD ../tokudb.2.2.0

git-svn-id: file:///svn/toku/tokudb.2037b@15629 c7de825b-a66e-492c-adef-691d508d4ae1

Added test (src/tests/recover-compare-db-descriptor.abortrecover) that fails before this change, succeeds with it.

git-svn-id: file:///svn/toku/tokudb.2037b@15589 c7de825b-a66e-492c-adef-691d508d4ae1