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gilbertchen
2017-05-22 16:59:14 -04:00
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@@ -16,7 +16,6 @@ OPTIONS:
-chunk-size, -c 4M the average size of chunks -chunk-size, -c 4M the average size of chunks
-max-chunk-size, -max 16M the maximum size of chunks (defaults to chunk-size * 4) -max-chunk-size, -max 16M the maximum size of chunks (defaults to chunk-size * 4)
-min-chunk-size, -min 1M the minimum size of chunks (defaults to chunk-size / 4) -min-chunk-size, -min 1M the minimum size of chunks (defaults to chunk-size / 4)
-compression-level, -l <level> compression level (defaults to -1)
``` ```
The *init* command first connects to the storage specified by the storage URL. If the storage has been already been The *init* command first connects to the storage specified by the storage URL. If the storage has been already been
@@ -34,8 +33,6 @@ The -e option controls whether or not encryption will be enabled for the storage
The three chunk size parameters are passed to the variable-size chunking algorithm. Their values are important to the overall performance, especially for cloud storages. If the chunk size is too small, a lot of overhead will be in sending requests and receiving responses. If the chunk size is too large, the effect of deduplication will be less obvious as more data will need to be transferred with each chunk. The three chunk size parameters are passed to the variable-size chunking algorithm. Their values are important to the overall performance, especially for cloud storages. If the chunk size is too small, a lot of overhead will be in sending requests and receiving responses. If the chunk size is too large, the effect of deduplication will be less obvious as more data will need to be transferred with each chunk.
The compression level parameter is passed to the zlib library. Valid values are -1 through 9, with 0 meaning no compression, 9 best compression (slowest), and -1 being the default value (equivalent to level 6).
Once a storage has been initialized with these parameters, these parameters cannot be modified any more. Once a storage has been initialized with these parameters, these parameters cannot be modified any more.
#### Backup #### Backup