Version 1.3.1 (10 March 2011)

• Possibly breaking changes
  • No longer open syscall files with O_SYNC|O_DSYNC|O_RSYNC by default when doing direct I/O, to avoid a write performance decrease starting with Linux kernel version 2.6.32. A stxxl::file::SYNC flag has been added to allow forcing the O_*SYNC flags when opening files.
  • Lock files by default (if implemented for this file type), can by disabled via stxxl::file::NO_LOCK.
  • block_prefetcher now takes a completion_handler instead of a raw function pointer. Furthermore, the completion_handler is already executed after the read operation completes, not only when the issuer waits for it to complete. The I/O thread issues the call to the completion_handler, so for multiple disks, this may happen concurrently.
• Internal changes, not user-visible
  • Change handling of (empty) filler elements in typed_block to fix mismatching struct size in nested blocks.
  • Removed debugmon which was very limited and disabled for a long time.
• Bugfixes
  • Allow prefetch schedule computation of vectors that are bound to a file.
  • Fix race growing files during concurrent block allocation.