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| author | yanyiwu <i@yanyiwu.com> | 2015-02-03 00:28:28 +0800 |
|---|---|---|
| committer | yanyiwu <i@yanyiwu.com> | 2015-02-03 00:28:28 +0800 |
| commit | 77cab2b57031a5c6ab43822635307541ab243d08 (patch) | |
| tree | 98499f22c37df2086e6cf121f6f6372830c2abc2 | |
| parent | 0e23ee4dce0f700f1aa0651bcce551336f428c85 (diff) | |
| download | seaweedfs-77cab2b57031a5c6ab43822635307541ab243d08.tar.xz seaweedfs-77cab2b57031a5c6ab43822635307541ab243d08.zip | |
usecase: Data Migration Example
| -rw-r--r-- | docs/usecases.rst | 61 |
1 files changed, 60 insertions, 1 deletions
diff --git a/docs/usecases.rst b/docs/usecases.rst index 8a9a6d44a..ed70f0015 100644 --- a/docs/usecases.rst +++ b/docs/usecases.rst @@ -52,4 +52,63 @@ However, if blocking servicing port is not feasible or trivial, a white list opt weed master -whiteList="::1,127.0.0.1" weed volume -whiteList="::1,127.0.0.1" - # "::1" is for IP v6 localhost.
\ No newline at end of file + # "::1" is for IP v6 localhost. + + +Data Migration Example +############################# + +.. code-block:: bash + + weed master -mdir="/tmp/mdata" -defaultReplication="001" -ip="localhost" -port=9334 + weed volume -dir=/tmp/vol1/ -mserver="localhost:9334" -ip="localhost" -port=8081 + weed volume -dir=/tmp/vol2/ -mserver="localhost:9334" -ip="localhost" -port=8082 + weed volume -dir=/tmp/vol3/ -mserver="localhost:9334" -ip="localhost" -port=8083 + +.. code-block:: bash + + ls vol1 vol2 vol3 + vol1: + 1.dat 1.idx 2.dat 2.idx 3.dat 3.idx 5.dat 5.idx + vol2: + 2.dat 2.idx 3.dat 3.idx 4.dat 4.idx 6.dat 6.idx + vol3: + 1.dat 1.idx 4.dat 4.idx 5.dat 5.idx 6.dat 6.idx + +stop all of them + +move vol3/* to vol1 and vol2 + +it is ok to move x.dat and x.idx from one volumeserver to another volumeserver, +because they are exactly the same. +it can be checked by md5. + +.. code-block:: bash + + md5 vol1/1.dat vol2/1.dat + MD5 (vol1/1.dat) = c1a49a0ee550b44fef9f8ae9e55215c7 + MD5 (vol2/1.dat) = c1a49a0ee550b44fef9f8ae9e55215c7 + md5 vol1/1.idx vol2/1.idx + MD5 (vol1/1.idx) = b9edc95795dfb3b0f9063c9cc9ba8095 + MD5 (vol2/1.idx) = b9edc95795dfb3b0f9063c9cc9ba8095 + +.. code-block:: bash + + ls vol1 vol2 vol3 + vol1: + 1.dat 1.idx 2.dat 2.idx 3.dat 3.idx 4.dat 4.idx 5.dat 5.idx 6.dat 6.idx + vol2: + 1.dat 1.idx 2.dat 2.idx 3.dat 3.idx 4.dat 4.idx 5.dat 5.idx 6.dat 6.idx + vol3: + +start + +.. code-block:: bash + + weed master -mdir="/tmp/mdata" -defaultReplication="001" -ip="localhost" -port=9334 + weed volume -dir=/tmp/vol1/ -mserver="localhost:9334" -ip="localhost" -port=8081 + weed volume -dir=/tmp/vol2/ -mserver="localhost:9334" -ip="localhost" -port=8082 + +so we finished moving data of localhost:8083 to localhost:8081/localhost:8082 + + |