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doc/glossary: Add "OMAP" to glossary

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Add an entry for "OMAP" to the glossary. This commit represents only the
first improvement to the documentation of OMAP in the Ceph docs suite.

Signed-off-by: Zac Dover <zac.dover@proton.me>
This commit is contained in:
Zac Dover 2024-02-26 07:14:25 +10:00
parent fa5ef874ac
commit 1d8baa1d4c
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doc/glossary.rst
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@ -287,6 +287,19 @@
Object Storage Device
See :term:`OSD`.
OMAP
"object map". A key-value store (a database) that is used to
reduce the time it takes to read data from and to write to the
Ceph cluster. RGW bucket indexes are stored as OMAPs.
Erasure-coded pools cannot store RADOS OMAP data structures.
Run the command ``ceph osd df`` to see your OMAPs.
See Eleanor Cawthon's 2012 paper `A Distributed Key-Value Store
using Ceph
<https://ceph.io/assets/pdfs/CawthonKeyValueStore.pdf>`_ (17
pages).
OSD
Probably :term:`Ceph OSD`, but not necessarily. Sometimes
(especially in older correspondence, and especially in