This short report brings to light some interesting commits to
scylla.git master from the last week. Commits in the
dbd0b9a3ef..f7e00e781c21 range are covered.
There were 66 non-merge commits from 13 authors in that period. Some notable commits:
There is a new internal keyspace, "system_distributed_everywhere",
which is used to propagate internal information that needs higher
consistency and bandwidth than gossip. The first user will be
Change Data Capture internal data.
The redis protocol server relied on code that was copy-pasted
from the cql transport server. The two implementations are now
unified into a generic
The underlying json parser used by alternator, rapidjson, has
against out-of-memory errors.
Reshape is a process that takes place when Scylla needs to
incorporate new sstables, such as from repair. It has now reduced
write amplification for Time Window Compaction Strategy
The scylla_setup script now supports disabling
the NVMe write-back cache on disks that allow it. This is
useful to reduce latency on Google Cloud Platform local disks. The
machine images built using scylla-machine-image
will do this automatically.
The sstable parser will avoid
large allocations, reducing latency spikes.
See you in the next issue of last week in scylla.git master!