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    • Marc Vef's avatar
      Merge branch 'setup-v0.9.4' into 'master' · e7751d13
      Marc Vef authored
      Setup v0.9.4
      
      Setup dependencies, docker, version numbers, spack.
      
      See merge request !200
      e7751d13
    • Marc Vef's avatar
    • Marc Vef's avatar
      fede0359
    • Marc Vef's avatar
      Spack: Support v0.9.3 · 386f4511
      Marc Vef authored
      386f4511
    • Marc Vef's avatar
      Merge branch 'release-0.9.3' into 'master' · 05874f69
      Marc Vef authored
      Release 0.9.3
      
      
      See merge request !199
      v0.9.3
      05874f69
    • Marc Vef's avatar
      Bump Versions and update changelog for release · c9e64c5e
      Marc Vef authored
      c9e64c5e
    • Marc Vef's avatar
      Restructuring of Readme · 5fbc9f50
      Marc Vef authored
      5fbc9f50
    • Marc Vef's avatar
      Merge branch 'marc/62-shared-file-metadata-congestion-2' into 'master' · c300a359
      Marc Vef authored
      Resolve "Shared file metadata congestion"
      
      During write operations, the client must update the file size on the responsible metadata daemon. The write size cache
      can reduce the metadata load on the daemon and reduce the number of RPCs during write operations, especially for many
      small I/O operations. In the past, we have observed that a daemon can become network-congested, especially for single shared files, many processes, and small I/O operations, which bottlenecks the overall I/O throughput. Nevertheless, the cache can have a broad impact on small I/O operations as 1 RPC for updating the size is removed which already improves small file I/O on a single node.
      
      Note that this cache may impact file size consistency in which stat operations may not reflect the actual file size
      until the file is closed. The cache does not impact the consistency of the file data itself. We did not observe any issues with the cache for HPC applications and benchmarks, but it technically breaks POSIX. So, for now, I suggest it to be experimental and opt-in.
      
      - `LIBGKFS_WRITE_SIZE_CACHE` - Enable caching the write size of files (default: OFF).
      - `LIBGKFS_WRITE_SIZE_CACHE_THRESHOLD` - Set the number of write operations after which the file size is synchronized
        with the corresponding daemon (default: 1000). The file size is further synchronized when the file is `close()`d or
        when `fsync()` is called.
      
      Depends on https://storage.bsc.es/gitlab/hpc/gekkofs/-/merge_requests/194
      
      Closes #62
      
      Closes #62
      
      See merge request !193
      c300a359
    • Marc Vef's avatar
      Readme, changelog, and changed defaults · 680fe6b5
      Marc Vef authored
      680fe6b5
    • Marc Vef's avatar
      Adding write_size cache. New envs: LIBGKFS_WRITE_SIZE_CACHE=ON · ef4620f7
      Marc Vef authored
      , enable by config and disable via `LIBGKFS_WRITE_SIZE_CACHE=OFF`. Flush happens on close/fsync. flush threshold can be changed via config or `LIBGKFS_WRITE_SIZE_CACHE_THRESHOLD=100` 
      ef4620f7
    • Marc Vef's avatar
      Merge branch 'marc/298-tests-fail-when-symlink-support-is-disabled' into 'master' · 950ba459
      Marc Vef authored
      Resolve "Tests fail when symlink support is disabled"
      
      This MR does several things:
      1. `SUPPORT_SYMLINKS` is now disabled by default. It didn't do much in the first place and only affects incomplete code. The corresponding README entry has been removed. The only thing it does support is accessing GekkoFS from a foreign namespace via a symbolic link. However, only `stat` seems to be working.
      2. `GKFS_FOLLOW_EXTERNAL_SYMLINKS` was also disabled by default in this [MR](https://storage.bsc.es/gitlab/hpc/gekkofs/-/merge_requests/183). This caused the `test_symlink` to fail as it tested external symlinks into GekkoFS, not actual symlinks within GekkoFS. This can only be done via `lstat()` for each component of the path which is a performance risk under certain circumstances. Overall, this is the relevant CMake variable for the test.
      3. Unify code formatting for CMake files.
      
      Closes #298
      
      Closes #298
      
      See merge request !198
      950ba459