feat(chunkserver): add HDD_CHUNK_BULK_SIZE option

[lgsilva3087]

Introduce a reloadable HDD_CHUNK_BULK_SIZE option for chunkserver. Use it for chunk registration and damaged/lost/new report bulks. Add default (1000) to config template, admin defaults, and docs.

LS-564

[gemini-code-assist]

Code Review

This pull request introduces a new configuration option, HDD_CHUNK_BULK_SIZE, which allows users to define the number of chunks processed in a single bulk operation when reporting to the master server. This change replaces several hardcoded instances of the value 1000 with a reloadable atomic variable. The review feedback suggests enforcing a reasonable upper bound on this configuration value using cfg_get_minmaxvalue to prevent potential memory exhaustion or network communication issues caused by excessively large bulk sizes.

[Copilot]

Pull request overview

Adds a new reloadable chunkserver configuration option (HDD_CHUNK_BULK_SIZE) to control how many chunks are grouped per bulk when communicating chunk lists to the master, and propagates this option through code/config/docs.

Changes:

• Introduce a reloadable HDD_CHUNK_BULK_SIZE setting (default 1000) backed by an atomic (gChunkBulkSize).
• Use the configured bulk size for chunk registration bulks and damaged/lost/new chunk report bulks.
• Update config template, admin default dump, and chunkserver config manpage with the new option.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/data/sfschunkserver.cfg.in	Documents the new HDD_CHUNK_BULK_SIZE option in the sample config.
src/chunkserver/masterconn.cc	Uses the configured bulk size for damaged/lost/new chunk report bulks.
src/chunkserver/master_connection.cc	Uses the configured bulk size for registration chunk bulks.
src/chunkserver/hddspacemgr.h	Adds kDefaultChunkBulkSize and atomic gChunkBulkSize; updates bulk API signature.
src/chunkserver/hddspacemgr.cc	Loads/stores HDD_CHUNK_BULK_SIZE on init and reload.
src/admin/dump_config_command.cc	Adds the default value for HDD_CHUNK_BULK_SIZE to chunkserver defaults.
doc/sfschunkserver.cfg.5.adoc	Documents the new HDD_CHUNK_BULK_SIZE option in the manpage.

[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated no new comments.

[GigaCronos]

Looks good. Please check my suggestion. Also consider creating and linking the corresponding Linear Issue.

[GigaCronos]

LGTM.

[antuan96314]

LGTM, However, consider complementing PR with a test to make sure it works as expected.

[ralcolea]

LGTM! 👍

[lgsilva3087]

LGTM, However, consider complementing PR with a test to make sure it works as expected.

I added a simple one.