Lock the random access if a forward or backward seek is detected #1250
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
|
Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA). View this failed invocation of the CLA check for more information. For the most up to date status, view the checks section at the bottom of the pull request. |
| && consecutiveSequentialCount >= readOptions.getFadviseRequestTrackCount() | ||
| && readOptions.getFadvise() == Fadvise.AUTO_RANDOM; | ||
| } | ||
|
|
||
| private boolean shouldDetectRandomAccess() { | ||
| return !randomAccess |
There was a problem hiding this comment.
If already in randomAccess mode there is no need to detect random access.
I do agree that the current logic will not update backwardSeek and forwardSeek if occurredwhen random access was set but I would suggest updating those flags well within fn:updateAccessPattern .
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
The optimized
AUTO_RANDOMmode currently requires a switch tosequentialbefore it can switch to random. The proposed change locks the access pattern torandomas soon as a forward or backward seek is detected.