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r1601 | sears.russell@gmail.com | 2012-03-20 18:43:00 -0400 (Tue, 20
Mar 2012) | 1 line
commit bLSM bloom filter to stasis/util, which is where it really
belongs
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r1600 | sears.russell@gmail.com | 2012-03-04 01:58:38 -0500 (Sun, 04
Mar 2012) | 1 line
fix memory leak in skiplist unit test (now it is valgrind clean)
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r1599 | sears.russell@gmail.com | 2012-03-04 01:58:05 -0500 (Sun, 04
Mar 2012) | 1 line
fix typo in finalize type
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r1598 | sears.russell@gmail.com | 2012-03-04 00:59:59 -0500 (Sun, 04
Mar 2012) | 1 line
add comparator and finalizer parameters to skiplist constructor
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r1597 | sears.russell@gmail.com | 2012-03-03 18:23:16 -0500 (Sat, 03
Mar 2012) | 1 line
bugfixes for skiplist
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r1596 | sears.russell@gmail.com | 2012-03-02 15:05:07 -0500 (Fri, 02
Mar 2012) | 1 line
updated concurrentSkipList. Seeing strange crashes
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r1595 | sears.russell@gmail.com | 2012-03-01 16:51:59 -0500 (Thu, 01
Mar 2012) | 1 line
add progress reports
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r1594 | sears.russell@gmail.com | 2012-02-28 13:17:05 -0500 (Tue, 28
Feb 2012) | 1 line
experimental support for automatic logfile preallocation
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r1593 | sears.russell@gmail.com | 2012-02-28 12:10:01 -0500 (Tue, 28
Feb 2012) | 1 line
add histogram reporting to rawIOPS benchmark
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r1592 | sears.russell@gmail.com | 2012-02-24 16:31:36 -0500 (Fri, 24
Feb 2012) | 1 line
userspace raid 0 implementation
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r1591 | sears.russell@gmail.com | 2012-02-12 01:47:25 -0500 (Sun, 12
Feb 2012) | 1 line
add skiplist unit test, fix compile warnings
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r1590 | sears.russell@gmail.com | 2012-02-12 00:52:52 -0500 (Sun, 12
Feb 2012) | 1 line
fix compile error
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r1589 | sears.russell@gmail.com | 2012-02-12 00:50:21 -0500 (Sun, 12
Feb 2012) | 1 line
fix some bugs in hazard.h surrounding thread list management and
overruns of R under high contention
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r1588 | sears.russell@gmail.com | 2012-02-11 14:23:10 -0500 (Sat, 11
Feb 2012) | 1 line
add hazard pointer for get_lock. It was implicitly blowing away the
hazard pointer protecting y in the caller
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r1587 | sears.russell@gmail.com | 2012-02-10 18:51:25 -0500 (Fri, 10
Feb 2012) | 1 line
fix null pointer bug
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r1586 | sears.russell@gmail.com | 2012-02-10 18:03:39 -0500 (Fri, 10
Feb 2012) | 1 line
add simple refcounting scheme to concurrentSkipList. This solves the
problem where a deleted node points to another deleted node, and we
only have a hazard pointer for the first node.
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r1585 | sears.russell@gmail.com | 2012-02-10 14:19:14 -0500 (Fri, 10
Feb 2012) | 1 line
add hazard pointers for update using the smallest free slot first. The
old method left a race condition, since hazard_scan stops at the first
null pointer.
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r1584 | sears.russell@gmail.com | 2012-02-10 02:45:30 -0500 (Fri, 10
Feb 2012) | 1 line
add hazard pointers for update array
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r1583 | sears.russell@gmail.com | 2012-02-10 00:04:50 -0500 (Fri, 10
Feb 2012) | 1 line
skiplist update: concurrent, but broken
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r1582 | sears.russell@gmail.com | 2012-02-09 17:44:27 -0500 (Thu, 09
Feb 2012) | 1 line
skip list implementation. Not concurrent yet.
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r1581 | sears.russell@gmail.com | 2012-02-08 13:33:29 -0500 (Wed, 08
Feb 2012) | 1 line
Commit of a bunch of new, unused code: KISS random number generator,
Hazard Pointers, SUX latches (untested) and bit twiddling for
concurrent b-tree
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r1580 | sears.russell@gmail.com | 2012-01-17 19:17:37 -0500 (Tue, 17
Jan 2012) | 1 line
fix typo
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r1579 | sears.russell@gmail.com | 2012-01-11 18:33:31 -0500 (Wed, 11
Jan 2012) | 1 line
static build fixes for linux. hopefully these do not break macos...
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r1578 | sears.russell@gmail.com | 2012-01-09 19:13:34 -0500 (Mon, 09
Jan 2012) | 1 line
fix cmake under linux
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r1577 | sears.russell@gmail.com | 2012-01-09 18:37:15 -0500 (Mon, 09
Jan 2012) | 1 line
fix linux static binary compilation bugs
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r1576 | sears.russell | 2012-01-09 18:00:08 -0500 (Mon, 09 Jan 2012) |
1 line
port to macos x
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r1575 | sears.russell | 2012-01-09 17:39:43 -0500 (Mon, 09 Jan 2012) |
1 line
add missing _ from sync call name
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r1574 | sears.russell@gmail.com | 2012-01-09 14:26:31 -0500 (Mon, 09
Jan 2012) | 1 line
add -rt flag to static builds
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r1573 | sears.russell@gmail.com | 2011-12-20 23:38:29 -0500 (Tue, 20
Dec 2011) | 1 line
Simple makefile geared toward building libstasis.so and libstasis.a
(and nothing else)
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r1572 | sears.russell@gmail.com | 2011-12-20 22:37:54 -0500 (Tue, 20
Dec 2011) | 1 line
add some missing #include<config.h> lines
Replacement policies now track the pin count of each page that they interact with. This behavior used to live in bufferHash, and had never been ported to concurrentBufferManager.
For various reasons, the pin counts have to be updated atomically with the LRU state. This would be very difficult to do inside of concurrentBufferManager, which sometimes needs to add and remove pages to replacement policies without holding any other latches.
The region allocator marks freed regions "Condemned" before actually freeing them. Condemned regions are associated
with a transaction; before they can be reused / coalesced the transaction that condemned them must complete.
The region allocator used "TisActiveTransaction(xid)" to determine whether a given transaction had completed. The
problem is that Stasis now reuses transaction id's, and condemned regions were never reclaimed in practice. A transaction
fingerprint is a unique identifier (currently transaction id, rec_lsn) that can be used to distinguish transactions that
did not execute concurrently.
I considered an alternative design based upon end-of-transaction actions. This would have worked as well, but would
have been a more invasive change.
