Changelog

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0.3.0

  • If using local storage ({:local, directory}), writes now share one exclusive OS lock per store root, held for each mutation until it is synced to disk. Multiple processes can open the store; SlateDB fencing still enforces one writer per database. Before starting this version, stop all processes accessing that store with older slap_slatedb versions, which do not take this lock. Use the same root in every process accessing the data, and keep the root's .slap-lock#0 file. Before starting another cluster, see running another cluster on the same store.
  • Local stores reject recognized network filesystems, including NFS and SMB/CIFS.
  • Local stores sync object writes and completed uploads to disk with fsync. On Unix, they also sync directory changes. Persistence depends on the filesystem and device honoring sync requests. Writes and opens can take longer.
  • Local stores support conditional updates ({:update, version}). This lets SlateDB's garbage collector remove obsolete metadata on subsequent runs and lets slap_cluster use ObjectLease on local storage. Conditional updates return :unsupported on filesystems without microsecond modification times.
  • Fixes config :rustler_precompiled, :force_build, slap_slatedb: true being ignored. It now builds the NIF from source, as SLAP_SLATEDB_BUILD=1 does.
  • Adds get_range/3 to preview a value with :max_value_bytes and optional :value_range, and preview_iterator/2 to preview keys and values with :max_key_bytes and :max_value_bytes. Both return full sizes and limit bytes copied into the BEAM; SlateDB still loads whole rows in native memory.

0.2.0

  • Upgrades SlateDB to 0.17. Databases written by 0.16 open unchanged.
  • Slap.SlateDB.Iterator.seek/3 returns an error with kind: :invalid for an iterator with order: :desc.
  • Raises the maximum key size from 65,535 bytes to 4 GiB minus one byte.
  • Slap.SlateDB.ObjectStore.download/3 accepts range: {first, last} (inclusive) to download part of an object.
  • SlateDB 0.17's new settings can be passed in :settings, among them compactor_options.checkpoint_lifetime and compactor_options.scheduler_options.sorted_run_consolidation_threshold.

0.1.0

Initial release of slap_slatedb.