DOC 2.2.6
File System
Each of your JSON nodes are saved in blocks to form a record.
All blocks and records are searchable through position calculations in index and data files.
You can see the sizes of the data and index files at any time.
fs index sizefs data sizefs index calcul posfs index blockfs index countfs data blockfs data recordfs cache sizefs lock sizefs unused data blockfs unused nb blockfs unused last block
fs index size <page> <nbByPage>
Description
To show the size of all index files (by page)
To show the size of all index files (by page)
Parameters
page: The page - integer >= 1 - required
nbByPage: The number by page - integer>0 - required
page: The page - integer >= 1 - required
nbByPage: The number by page - integer>0 - required
admin
fs index size 1 10
mentdb
[<br> {<br> "percent_used": 6,<br> "current_max_block_size": 16,<br> "size": 200,<br> "current_block_size": 1,<br> "percent_graph": "|-----------------------------",<br> "indexFileId": 0<br> },<br> {<br> "percent_used": 12,<br> "current_max_block_size": 16,<br> "size": 200,<br> "current_block_size": 2,<br> "percent_graph": "|||---------------------------",<br> "indexFileId": 1<br> },<br> {<br> "percent_used": 31,<br> "current_max_block_size": 16,<br> "size": 200,<br> "current_block_size": 5,<br> "percent_graph": "|||||||||---------------------",<br> "indexFileId": 2<br> },<br> {<br> "percent_used": 25,<br> "current_max_block_size": 16,<br> "size": 200,<br> "current_block_size": 4,<br> "percent_graph": "|||||||-----------------------",<br> "indexFileId": 3<br> },<br> {<br> "percent_used": 37,<br> "current_max_block_size": 16,<br> "size": 200,<br> "current_block_size": 6,<br> "percent_graph": "|||||||||||-------------------",<br> "indexFileId": 4<br> },<br> {<br> "percent_used": 0,<br> "current_max_block_size": 16,<br> "size": 200,<br> "current_block_size": 0,<br> "percent_graph": "------------------------------",<br> "indexFileId": 5<br> },<br> {<br> "percent_used": 0,<br> "current_max_block_size": 16,<br> "size": 200,<br> "current_block_size": 0,<br> "percent_graph": "------------------------------",<br> "indexFileId": 6<br> },<br> {<br> "percent_used": 6,<br> "current_max_block_size": 16,<br> "size": 200,<br> "current_block_size": 1,<br> "percent_graph": "|-----------------------------",<br> "indexFileId": 7<br> },<br> {<br> "percent_used": 12,<br> "current_max_block_size": 16,<br> "size": 200,<br> "current_block_size": 2,<br> "percent_graph": "|||---------------------------",<br> "indexFileId": 8<br> },<br> {<br> "percent_used": 25,<br> "current_max_block_size": 16,<br> "size": 200,<br> "current_block_size": 4,<br> "percent_graph": "|||||||-----------------------",<br> "indexFileId": 9<br> }<br>]
admin
metric index files 1 10;
mentdb
Total block: 1000x16=16000<br>Total size: 1000x200=200000b<br>|----------------------------- 6% - 0 - used: 1, free: 15, total block: 16, size: 200b<br>|||--------------------------- 12% - 1 - used: 2, free: 14, total block: 16, size: 200b<br>|||||||||--------------------- 31% - 2 - used: 5, free: 11, total block: 16, size: 200b<br>|||||||----------------------- 25% - 3 - used: 4, free: 12, total block: 16, size: 200b<br>|||||||||||------------------- 37% - 4 - used: 6, free: 10, total block: 16, size: 200b<br>------------------------------ 0% - 5 - used: 0, free: 16, total block: 16, size: 200b<br>------------------------------ 0% - 6 - used: 0, free: 16, total block: 16, size: 200b<br>|----------------------------- 6% - 7 - used: 1, free: 15, total block: 16, size: 200b<br>|||--------------------------- 12% - 8 - used: 2, free: 14, total block: 16, size: 200b<br>|||||||----------------------- 25% - 9 - used: 4, free: 12, total block: 16, size: 200b<br>
fs data size <page> <nbByPage>
Description
To show the size of all data files in a page
To show the size of all data files in a page
Parameters
page: The page - integer >= 1 - required
nbByPage: The number by page - integer>0 - required
page: The page - integer >= 1 - required
nbByPage: The number by page - integer>0 - required
admin
fs data size 1 2
mentdb
[<br> {<br> "dataFileId": 0,<br> "percent_used": 0,<br> "current_max_block_size": 10000000,<br> "size": 1583616,<br> "current_block_size": 6186,<br> "nbUnusedBlock": 22,<br> "percent_graph": "------------------------------",<br> "lastUnusedBlock": 1577216<br> }<br>]
admin
metric data files 1 2;
mentdb
------------------------------ 0% - 0 - used: 6186, free: 9993814, total block: 10000000, size: 1583616b, max size: 2560Mb, last unused block: 1577216, nb unused block: 22
fs index calcul pos <key>
Description
To calculate the index position for a specific key
To calculate the index position for a specific key
Parameters
key: The key - string - required
key: The key - string - required
admin
fs index calcul pos "W[cat]"
mentdb
{<br> "indexPosition": 8,<br> "key": "W[cat]",<br> "indexFileId": 115<br>}
fs index block <indexFileId> <position>
Description
To show a specific block at a position in an index file (The first 8 bytes is the number of block from the index file)
To show a specific block at a position in an index file (The first 8 bytes is the number of block from the index file)
Parameters
indexFileId: The index file id - integer >= 0 - required
position: The position - integer >= 0 - required
indexFileId: The index file id - integer >= 0 - required
position: The position - integer >= 0 - required
admin
fs index block 115 8
mentdb
{<br> "DataFileId": 0,<br> "DataPosition": 1575168<br>}
fs index count <indexFileId>
Description
To show the number of block from an index file
To show the number of block from an index file
Parameters
indexFileId: The index file id - integer >= 0 - required
indexFileId: The index file id - integer >= 0 - required
admin
fs index count 115
mentdb
2
fs data block <dataFileId> <position>
Description
To show a specific block at a position from a data file
To show a specific block at a position from a data file
Parameters
dataFileId: The data file id - integer >= 0 - required
position: The position - integer >= 0 - required
dataFileId: The data file id - integer >= 0 - required
position: The position - integer >= 0 - required
admin
#Here the collision block;<br>fs data block 0 1575168
mentdb
{<br> "nextBlockAddress": -1,<br> "data": "W1siV1tjYXRdIiwwLDE1NzU0MjRdXQ\u003d\u003d"<br>}
fs data record <dataFileId> <position>
Description
To show all blocks in a record at the position in a data file
To show all blocks in a record at the position in a data file
Parameters
dataFileId: The data file id - integer >= 0 - required
position: The position - integer >= 0 - required
dataFileId: The data file id - integer >= 0 - required
position: The position - integer >= 0 - required
admin
#Here the collision record;<br>fs data record 0 1575168
mentdb
[<br> {<br> "blockId": 1,<br> "block": {<br> "nextBlockAddress": -1,<br> "data": "W1siV1tjYXRdIiwwLDE1NzU0MjRdXQ\u003d\u003d"<br> },<br> "position": 1575168<br> },<br> "[[\"W[cat]\",0,1575424]]"<br>]
admin
#Here the data record W[cat];<br>fs data record 0 1575424
mentdb
[<br> {<br> "blockId": 1,<br> "block": {<br> "nextBlockAddress": -1,<br> "data": "eyJmbCI6eyJlbiI6eyJsdGwiOiJUSFs2dF0iLCJmdGwiOiJUSFs2dF0ifX0sInciOjIsImsiOiJXW2NhdF0ifQ\u003d\u003d"<br> },<br> "position": 1575424<br> },<br> "{\"fl\":{\"en\":{\"ltl\":\"TH[6t]\",\"ftl\":\"TH[6t]\"}},\"w\":2,\"k\":\"W[cat]\"}"<br>]
admin
#Here the data node W[cat];<br>node show W[cat]
mentdb
{<br> "fl": {<br> "en": {<br> "ltl": "TH[72]",<br> "ftl": "TH[6t]"<br> }<br> },<br> "w": 10,<br> "k": "W[cat]"<br>}
fs cache size
Description
To show the cache size
To show the cache size
admin
fs cache size
mentdb
512
fs lock size
Description
To show the lock size
To show the lock size
admin
fs lock size
mentdb
21
fs unused data block <dataFileId> <limit>
Description
To show the unused block list (after a block was deleted). The list return the last block before.
To show the unused block list (after a block was deleted). The list return the last block before.
Parameters
dataFileId: The data file id - integer >= 0 - required
limit: The limit - integer >= 0 - required
dataFileId: The data file id - integer >= 0 - required
limit: The limit - integer >= 0 - required
admin
fs unused data block 0 10
mentdb
[<br> 1577728,<br> 1578752,<br> 1579008,<br> 57344,<br> 1579520,<br> 1579776,<br> 1581312,<br> 1580288,<br> 1580032,<br> 1579264,<br> 1581824<br>]
fs unused nb block <dataFileId>
Description
To show the number of unused data block (after a block was deleted)
To show the number of unused data block (after a block was deleted)
Parameters
dataFileId: The data file id - integer >= 0 - required
dataFileId: The data file id - integer >= 0 - required
admin
fs unused nb block 0
mentdb
22
fs unused last block <dataFileId>
Description
To show the last unused data block (after a block was deleted)
To show the last unused data block (after a block was deleted)
Parameters
dataFileId: The data file id - integer >= 0 - required
dataFileId: The data file id - integer >= 0 - required
admin
fs unused last block 0
mentdb
1577728