State that jerasure is now supported
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@ -16,7 +16,8 @@ breaking changes in the future. However, the following is implemented:
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- Basic part: highly-available block storage with symmetric clustering and no SPOF
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- Performance ;-D
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- Two redundancy schemes: Replication and XOR n+1 (simplest case of EC)
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- Multiple redundancy schemes: Replication, XOR n+1, Reed-Solomon erasure codes
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based on jerasure library with any number of data and parity drives in a group
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- Configuration via simple JSON data structures in etcd
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- Automatic data distribution over OSDs, with support for:
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- Mathematical optimization for better uniformity and less data movement
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@ -39,7 +40,6 @@ breaking changes in the future. However, the following is implemented:
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- OSD creation tool (OSDs currently have to be created by hand)
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- Other administrative tools
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- Per-inode I/O and space usage statistics
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- jerasure EC support with any number of data and parity drives in a group
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- Parallel usage of multiple network interfaces
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- Proxmox and OpenNebula plugins
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- iSCSI proxy
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@ -353,6 +353,7 @@ and calculate disk offsets almost by hand. This will be fixed in near future.
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- Create global configuration in etcd: `etcdctl --endpoints=... put /vitastor/config/global '{"immediate_commit":"all"}'`
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(if all your drives have capacitors).
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- Create pool configuration in etcd: `etcdctl --endpoints=... put /vitastor/config/pools '{"1":{"name":"testpool","scheme":"replicated","pg_size":2,"pg_minsize":1,"pg_count":256,"failure_domain":"host"}}'`.
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For jerasure pools the configuration should look like the following: `2:{"name":"ecpool","scheme":"jerasure","pg_size":4,"parity_chunks":2,"pg_minsize":2,"pg_count":256,"failure_domain":"host"}`.
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- Calculate offsets for your drives with `node /usr/lib/vitastor/mon/simple-offsets.js --device /dev/sdX`.
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- Make systemd units for your OSDs. Look at `/usr/lib/vitastor/mon/make-units.sh` for example.
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Notable configuration variables from the example:
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