Add new zvol: Difference between revisions
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*<div><span style="font-size:small;">'''DEDUPLICATION''' - choose between :</span></div> | *<div><span style="font-size:small;">'''DEDUPLICATION''' - choose between :</span></div> | ||
**<span style="font-size:small;">'''Disbaled ( | **<span style="font-size:small;">'''Disbaled (default)'''</span> | ||
**'''On - '''<span style="color: rgb(51, 51, 51); font-family: 'Lucida Grande', Verdana, Arial, sans-serif; line-height: 19.200000762939453px; text-align: justify;">is simply a pseudonym for "sha256"</span> | **'''On - '''<span style="color: rgb(51, 51, 51); font-family: 'Lucida Grande', Verdana, Arial, sans-serif; line-height: 19.200000762939453px; text-align: justify;">is simply a pseudonym for "sha256"</span> | ||
**'''Verify - '''<span style="color: rgb(51, 51, 51); font-family: 'Lucida Grande', Verdana, Arial, sans-serif; line-height: 19.200000762939453px; text-align: justify;">is a pseudonym for "sha256,verify", </span><span style="color: rgb(85, 85, 85); line-height: 18px;">option that performs a full comparison of every incoming block with any alleged duplicate to ensure that they really are the same</span> | **'''Verify - '''<span style="color: rgb(51, 51, 51); font-family: 'Lucida Grande', Verdana, Arial, sans-serif; line-height: 19.200000762939453px; text-align: justify;">is a pseudonym for "sha256,verify", </span><span style="color: rgb(85, 85, 85); line-height: 18px;">option that performs a full comparison of every incoming block with any alleged duplicate to ensure that they really are the same</span> | ||
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*'''COMPRESSION - '''there are several data compression methods - You will see all available methods from the drop-down list. The default compression method is '''LZ4'''''.''You can also choose no compression ''('''''NONE'''). | *'''COMPRESSION - '''there are several data compression methods - You will see all available methods from the drop-down list. The default compression method is '''LZ4'''''.''You can also choose no compression ''('''''NONE'''). | ||
**<span style="font-family: verdana, geneva, sans-serif; line-height: 18px;">GZIP, the standards levels of 1 through 9 are supported, where 1 is as fast as possible, with the least compression, and 9 is as compressed as possible, taking as much time as necessary.</span> | **<span style="font-family: verdana, geneva, sans-serif; line-height: 18px;">GZIP, the standards levels of 1 through 9 are supported, where 1 is as fast as possible, with the least compression, and 9 is as compressed as possible, taking as much time as necessary.</span> | ||
** | **<span style="font-family: verdana, geneva, sans-serif; line-height: 18px;">LZJB - is a fast method with tight compression ratios, which is standard with most Lempel-Ziv algorithms. LZJB seems to provide the best all around results it terms of performance and compression.</span> | ||
** | **<span style="font-family: verdana, geneva, sans-serif; line-height: 18px;">ZLE is a very fast compression method, with very light compression ratios.</span> | ||
**<span style="font-family: verdana, geneva, sans-serif; line-height: 18px; background-color: rgb(246, 247, 249);">lz4 - is intended as a faster and smarter replacement for lzjb.</span> | **<span style="font-family: verdana, geneva, sans-serif; line-height: 18px; background-color: rgb(246, 247, 249);">lz4 - is intended as a faster and smarter replacement for lzjb.</span> | ||
*'''VOLUME BLOCK SIZE - '''the default value is '''64''' '''KiB. '''The value can be changed. You can choose between : 0,5 ; 1; 2; 4; 8; 16; 32; 64; 128 [KiB]. | *'''VOLUME BLOCK SIZE - '''the default value is '''64''' '''KiB. '''The value can be changed. You can choose between : 0,5 ; 1; 2; 4; 8; 16; 32; 64; 128 [KiB]. | ||
Revision as of 22:20, 15 June 2014
This function allows You to create a new zvol. You have to fill up or choose detailed information related to zvol :
- NAME - Name the new Zvol
- SIZE - Size of new Zvol. The unit for this values is GiB (Gibibyte).
In general, if You multiply 1024 ·1024 ·1024 = 1 073 741 824b, which is a result of eqaul 230.
For example, 1 GiB = 1024 × 1 MiB = 1024 × 1024 × 1 KiB = 1024 × 1024 × 1024 × 1 B = 1 073 741 824 ~ 1070 GB
- PROVISIONING - choose between the : thick provisioned and Thin provisioned (dafault).
- DEDUPLICATION - choose between :
- Disbaled (default)
- On - is simply a pseudonym for "sha256"
- Verify - is a pseudonym for "sha256,verify", option that performs a full comparison of every incoming block with any alleged duplicate to ensure that they really are the same
- sha 256 - performs a operation where same output given two different inputs, then it is reasonable to assume that when two blocks have the same checksum, they are in fact the same block.
- sha 256, verify - enables an ability to detect and correct hash collisions, however this is very system intensive and is not recommended for casual use
- COMPRESSION - there are several data compression methods - You will see all available methods from the drop-down list. The default compression method is LZ4.You can also choose no compression (NONE).
- GZIP, the standards levels of 1 through 9 are supported, where 1 is as fast as possible, with the least compression, and 9 is as compressed as possible, taking as much time as necessary.
- LZJB - is a fast method with tight compression ratios, which is standard with most Lempel-Ziv algorithms. LZJB seems to provide the best all around results it terms of performance and compression.
- ZLE is a very fast compression method, with very light compression ratios.
- lz4 - is intended as a faster and smarter replacement for lzjb.
- VOLUME BLOCK SIZE - the default value is 64 KiB. The value can be changed. You can choose between : 0,5 ; 1; 2; 4; 8; 16; 32; 64; 128 [KiB].
- SYNC - you can choose between three options :
- always (default)
- standard
- disabled
- LOG BIAS - allows to setup between the latency (default) and throughput.
- PRIMARY CACHE - one of three options have to be chosen :
- all (default)
- none
- metadata
- SECONDARY CACHE - one of three options have to be chosen :
- all (default)
- none
- metadata
- COPIES - number of copies of the data. As a default, it is set to 1.