Vitastor 1.4.1 released

• Fix a monitor crash on primary OSD switching introduced in 1.4.0
• Fix “partly outside array bounds” warnings for GCC 12 in cpp-btree
• Fix a realloc memory leak in theory possible with too large listings (OSD_OP_LIST)

2024-01-18 Continue reading →

Vitastor 1.4.0 released

New features

• Intelligent recovery/rebalance speed auto-tuning to reduce its impact on clients (see README -> Features)
• Auto-restoration of dead VDUSE daemons in CSI plugin
• Add vitastor-disk update-sb command
• Update QEMU for Debian Bookworm to 8.1 and use it for CSI plugin

2024-01-12 Continue reading →

Vitastor 1.3.0 released

New features

• Added RDMA without ODP support - much faster and all cards are now supported, not just Mellanox
• VDUSE in CSI - faster, more stable and can even recover after CSI pod restart!
• Reserve journal space for stabilize requests dynamically to prevent stalls under load with EC
• Raise default NBD timeout from 30 to 300 seconds and allow to take it from /etc/vitastor/vitastor.conf
• Remove explicit etcdUrl/etcdPrefix K8S storage class parameter support to prevent etcd migration issues for volumes created with these parameters
• Support QEMU 8.1 and pve-qemu 8.1

2023-12-04 Continue reading →

Vitastor 1.3.1 released

Hotfix to 1.3.0 - new “journal space reservation” had a bug which caused OSDs to crash with EC and without immediate_commit.

2023-12-04 Continue reading →

Vitastor 1.2.0 released

Snapshot and volume expansion support in CSI and an important bugfix for EC n+k with k>=2.

2023-11-05 Continue reading →

Vitastor 1.1.0 released

New features

• Implement client writeback cache
• Add the third I/O mode: O_DIRECT|O_SYNC (good for Optane)
• Reduce load on etcd by splitting OSD lease and statistics reporting intervals: etcd_stats_interval (default 30 sec)
• Make MON automatically filter OSDs by layout (block_size/immediate_commit/bitmap_granularity) to prevent “refusing to start PGs of this pool” errors on misconfiguration
• Support running fio benchmarks on systems without io_uring
• Make QEMU driver compatible with QEMU 8.1
• Document usage of vhost-user-blk

2023-10-27 Continue reading →

How Vitastor handles image snapshots

In fact, there are only 3 ways to implement snapshots: “redo”, “undo”, and “cow”. Also, proper snapshots should always be atomic. What does this all mean?

2023-08-30 Continue reading →

Vitastor 0.9.6 released

• Fix vitastor-disk partition zeroing (sometimes it was writing garbage instead of zeroes)
• Fix incorrect EC space statistics in vitastor-cli status
• Several bug fixes for NFS:
  • Add . and … in NFS directory listings
  • Return FILE_SYNC from NFS writes if immediate_commit is enabled
  • Return the same “verifier” in NFS COMMIT as in NFS WRITE
  • Make parallel NFS extending writes work correctly, without conflicts
  • Handle parallel NFS extending writes without imposing extra load on etcd
• Support UTF-8 in vitastor-cli table output
• Also allow “0” and “no” as false for inmemory_metadata and inmemory_journal
• Use HDD defaults for HDD-only in automatic vitastor-disk prepare mode

2023-07-29 Continue reading →

Vitastor 1.0.0 released

• Data and metadata checksums!
  • Metadata checksums are always used with new disk format
  • Data checksums can be turned on with --data_csum_type crc32c for new OSDs
  • Checksum block size can be configured
  • inmemory_metadata now also affects keeping checksums in memory
• Linux page cache I/O caching support which can be enabled separately for data, metadata (including checksums) and journal (O_SYNC instead of O_DIRECT)
• Details here
• Backwards compatibility is preserved, you can use new OSDs with old disks

Release also includes bug fixes from 0.9.6.

0.9.6 is moved to “-oldstable” repositories and will be available for some additional time.

2023-07-29 Continue reading →

Vitastor 0.9.5 released

A hotfix to 0.9.4 containing only one bugfix: 100% CPU usage in the new QEMU driver caused by the lack of eventfd reset on io_uring event handling :)

2023-07-20 Continue reading →