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I’ve proposed a slight rewording of this section to improve clarity and readability. (On-Disk Layout Paragraph)

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Signed-off-by: Raul Leite <sp4wn.root@gmail.com>
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Raul Leite 2025-11-14 15:31:21 -06:00
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docs/storage.md
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@ -11,13 +11,13 @@ Prometheus's local time series database stores data in a custom, highly efficien
### On-disk layout
Ingested samples are grouped into blocks of two hours. Each two-hour block consists
of a directory containing a chunks subdirectory containing all the time series samples
for that window of time, a metadata file, and an index file (which indexes metric names
and labels to time series in the chunks directory). The samples in the chunks directory
are grouped together into one or more segment files of up to 512MB each by default. When
series are deleted via the API, deletion records are stored in separate tombstone files
(instead of deleting the data immediately from the chunk segments).
Ingested samples are grouped into two-hour blocks. Each block consists of a directory that
contains a chunks subdirectory with all the time series samples for that time window,
a metadata file, and an index file (which maps metric names and labels to the time series
in the chunks directory). By default, the samples in the chunks directory are organized
into one or more segment files, each up to 512 MB. When series are deleted via the API,
deletion records are stored in separate tombstone files rather than being immediately
removed from the chunk segments.
The current block for incoming samples is kept in memory and is not fully
persisted. It is secured against crashes by a write-ahead log (WAL) that can be