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* [PATCH] grok-pull.post_update_hook: favor --sequential-shard for HDD
@ 2020-08-13  8:04 Eric Wong
  0 siblings, 0 replies; only message in thread
From: Eric Wong @ 2020-08-13  8:04 UTC (permalink / raw)
  To: meta

--sequential-shard offers better performance on HDD than -j0
since the on-disk active set can be kept small (with -j $HIGH_NUM).
--batch-size can also be helpful for systems with much RAM.
---
 examples/grok-pull.post_update_hook.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/examples/grok-pull.post_update_hook.sh b/examples/grok-pull.post_update_hook.sh
index 092ca283..1f51140f 100755
--- a/examples/grok-pull.post_update_hook.sh
+++ b/examples/grok-pull.post_update_hook.sh
@@ -124,7 +124,9 @@ then
 		: v2 inboxes may be init-ed with an empty msgmap
 		;;
 	*)
-		# if on HDD and limited RAM, add `-j0' w/ public-inbox 1.6.0+
+		# if on HDD and limited RAM, add `--sequential-shard'
+		# and possibly a large `--batch-size' if you have much
+		# memory in public-inbox 1.6.0+
 		$EATMYDATA public-inbox-index -v "$inbox_dir"
 		;;
 	esac

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2020-08-13  8:04 [PATCH] grok-pull.post_update_hook: favor --sequential-shard for HDD Eric Wong

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