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4eb72bb96a
The ms SSTable format, which introduces a trie-based partition index
replacing the previous Cassandra 3.0 index format used by me and md,
became the default value in the default scylla.yaml starting with
ScyllaDB 2026.2.
Changes:
- sstable_what_is.rst: add format links above the version table; add a
short ms format section with a link to the dedicated page.
- sstable/index.rst: remove format links (now in sstable_what_is.rst).
- sstable3/index.rst: add sstable-ms-index to the toctree and link list.
- sstable-format.rst: add SSTable Format Variants section documenting
the ms, me, and md options, ordered newest to oldest.
- sstable-ms-index.rst (new): dedicated page covering the trie-based
index benefits, and a Configuring ms Format section with subsections
for new clusters (2026.2 and later) and upgraded clusters, including
existing SSTable conversion behavior and nodetool upgradesstables -a.
Fixes SCYLLADB-1994
Related: https://github.com/scylladb/scylladb/issues/29442
Closes scylladb/scylladb#30148
(cherry picked from commit a0e160db8a)
Closes scylladb/scylladb#30234
