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| author | Samuel Merritt <sam@swiftstack.com> | 2015-01-11 13:41:35 -0800 |
|---|---|---|
| committer | Samuel Merritt <sam@swiftstack.com> | 2015-03-30 17:47:28 -0700 |
| commit | 8d3b3b2ee0a86b37b6ad1f4d201bfaa0103af07d (patch) | |
| tree | e9658bb56802a0e136601cf097977e187aa469a5 /doc/source/admin_guide.rst | |
| parent | cf21db4bc68aff190c55d416b406a44bf204ba36 (diff) | |
| download | swift-8d3b3b2ee0a86b37b6ad1f4d201bfaa0103af07d.tar.gz | |
Add some debug output to the ring builder
Sometimes, I get handed a builder file in a support ticket and a
question of the form "why is the balance [not] doing $thing?". When
that happens, I add a bunch of print statements to my local
swift/common/ring/builder.py, figure things out, and then delete the
print statements. This time, instead of deleting the print statements,
I turned them into debug() calls and added a "--debug" flag to the
rebalance command in hopes that someone else will find it useful.
Change-Id: I697af90984fa5b314ddf570280b4585ba0ba363c
Diffstat (limited to 'doc/source/admin_guide.rst')
| -rw-r--r-- | doc/source/admin_guide.rst | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/doc/source/admin_guide.rst b/doc/source/admin_guide.rst index d96353c84..5b7a02850 100644 --- a/doc/source/admin_guide.rst +++ b/doc/source/admin_guide.rst @@ -88,6 +88,16 @@ attempting to write to or read the builder/ring files while operations are in progress. This can be useful in environments where ring management has been automated but the operator still needs to interact with the rings manually. +If the ring builder is not producing the balances that you are +expecting, you can gain visibility into what it's doing with the +``--debug`` flag.:: + + swift-ring-builder <builder-file> rebalance --debug + +This produces a great deal of output that is mostly useful if you are +either (a) attempting to fix the ring builder, or (b) filing a bug +against the ring builder. + ----------------------- Scripting Ring Creation ----------------------- |