Shore Interim Snapshots

Shore has made a lot of progress since the so-called 2.0 release. It has had a lot of performance, reliability, and correctness bugs and problems fixed. It also has support for modern compilers, such as gcc-2.95.2, and real support for newer Unix-like platforms, such as NetBSD and Linux. However, we don't have the time or funding to put together a "real" Shore release. To make this more recent of Shore available to people, we've started an Interim Snapshot series of Shore "releases". They are not real releases with version numbers and full blown documentation. But what they ARE is a real working version of Shore that is far more robust than the latest "released" versions. You can find this interim snapshot, along with a some text notes and build instructions on the ftp server.

Please NOTE that although an interim snapshot has not been made since February 2004, that does not mean that shore is not progressing. What it does mean is that I'm running out of time and am trying to finish putting together gcc-4 support for shore. I hoped to make that available in the 4th quarter of 2006. However, I have lost funding for my work on this project, and work has stopped as a result. -- Bolo

Pending Shore Interim Snapshot

This are the feature lists for the possibly upcoming changes.

Uncertain delivery

• visual c++ 7 support (testing is the main problem here, shore apparently works, but something is broken with tcl and needs to be fixed to actualy verify that shore works).
• btree variable fill factor - exterior
• btree variable fill factor - interior

Snapshot 4

• gcc-3 support
• gcc-4 support
• c++ correctness fixes
• option to eliminate dependency on deprecated c++ features and classes.
• Shore configuration tool to generate a limited amount of shore.def and the dir scheme file for your local environment.

Shore Interim Snapshots

log seek Performance Patch -- march 2004

This patch to the 3rd Interim Snapshot decreases recovery and restart times in shore. This patch has not been applied to the 3rd snapshot. Why? Because it takes a lot of time to do all the testing for a snapshot.

Previously the current log segment was read from the start of the log. Most of this content was ignored as items that had already been committed, however the act of reading and ignoring the items took a lot of time. Now, the current log segment is read from the last snapshot of the log -- which guarantees that any log entries up to that point have been committed to disk.

Interim Snapshot 3 -- February 2004

• Support newer TCL with const arguments.
• Compile with newer gcc compilers -- gcc3 upto but not including gcc-3.3.
• Correct c++ exception handling with gcc beyond gcc-2.95.
• Fix a null pointer dereference in some transaction cases. This Bug fix from Adam Welc.
• Enforce per-partition log limit when reading config files.
• Support some "broken" versions of gcc shipped with linux versions. These versions were grabbed from the gnu tree, and are not formal gcc releases.
• Number of log partitions and number of pages in an extent can be specified in shore.def.
• NT builds work with newer Cygwin filename semantics.
• Parameterized shore list classes to eliminate open-coded offsetof() use. Newer g++/c++ changes the semantics of offsetof() which breaks code in shore.
• Allow subtracting w_statistics() classes so statistic deltas can be generated.
• Fix open-coded copied bugs in shore shell that broke 64 bit platforms.

Interim Snapshot 2 -- February 2002

• Add support for 64 bit architectures; Alpha on Digital Unix for now.
• Fixed some performance problems due to lock chain hashing, which affected btree insert rates.
• Changed on disk structures to be properly aligned for both 32 and 64 bit architectures.
• Modified the store info to have space for the upcoming change to allow adjustments in index split factors.

Interim Snapshot 1 -- October 2001

• Shore cooperates with the STL -- the STL preempts some rather common global names and Shore was using them.
• Support Largefiles on Linux.

Interim Snapshot 0 -- January 2001

• Support for gcc-2.95.2. Previously gcc-2.7.2.3 was the supported compiler.
• The list of bug fixes, performance improvements and other changes which have accumulated since the 2.0 releases is just too long to mention -- if they had ever been recorded outside the CVS logs.