https://github.com/couchbase/moss

moss - a simple, fast, ordered, persistable, key-val storage library for golang
https://github.com/couchbase/moss

Last synced: about 2 months ago
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moss - a simple, fast, ordered, persistable, key-val storage library for golang

• Host: GitHub
• URL: https://github.com/couchbase/moss
• Owner: couchbase
• License: other
• Created: 2016-02-06T20:27:22.000Z (almost 9 years ago)
• Default Branch: master
• Last Pushed: 2022-03-03T01:10:06.000Z (almost 3 years ago)
• Last Synced: 2024-07-31T20:49:17.342Z (5 months ago)
• Language: Go
• Homepage:
• Size: 904 KB
• Stars: 950
• Watchers: 72
• Forks: 59
• Open Issues: 46
• Metadata Files:
  • Readme: README-dgm.md
  • Contributing: CONTRIBUTING.md
  • License: LICENSE.txt

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README

        
# Instructions for DGM testing for moss

dgm_moss_test.go is a moss component level test that exercises moss.

Included in the test is a simulator of the moss herder memory stalling

functionality.

The test can be configured to generate a Results*.json file that can be

used with python script graph/dgm-moss-ploy.py to plot the resutls.

## Steps

Here is an example shell script to exercise the test.

```

#!/bin/bash

findDisk()

{

    dev=`df ${MossStore} | grep -v Filesystem | awk {'print $1'}`

    dirName=`dirname ${dev}`

    devName=`basename ${dev} ${dirName}`

    echo ${devName}

}

clearCaches()

{

    sudo sync

    sudo sh -c "echo 1 > /proc/sys/vm/drop_caches"

    sudo sh -c "echo 2 > /proc/sys/vm/drop_caches"

    sudo sh -c "echo 3 > /proc/sys/vm/drop_caches"

}

MossStore="/mossstore/MossStoreTest"

mkdir -p -m=0777 ${MossStore}

diskMonitor=`findDisk`

runDesc="${gitInfo}"

go test -v -test.run TestMossDGM -test.timeout 99999s -runTime 5m -memQuota 4gb -keyLength 48 -valueLength 48 -keyOrder random -numWriters 1 -writeBatchSize 100000 -writeBatchThinkTime 1ms -numReaders 16 -readBatchSize 100 -readBatchThinkTime 1ms -outputToFile -dbPath ${MossStore} -diskMonitor ${diskMonitor} -runDescription ${runDesc} -dbCreate

```

## Ploting a graph of the results

The python script requires numpy, pandas, matploglib

```

python dgm-moss-plot.py Results_...json

```

This will process a Results...png file.

## Notes

This test only runs properly on Linux as it gathers stats from /proc.