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  1. Core Server
  2. SERVER-19083

WiredTiger creationString in collstats contains non-collection level options

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    • Type: Icon: Bug Bug
    • Resolution: Done
    • Priority: Icon: Critical - P2 Critical - P2
    • 3.1.6
    • Affects Version/s: 3.0.4
    • Component/s: WiredTiger
    • None
    • Fully Compatible
    • ALL
    • Hide 
      backup_test:PRIMARY> use wt_test
switched to db wt_test
backup_test:PRIMARY> db.createCollection("source")
{ "ok" : 1 }
backup_test:PRIMARY> var creationString = db.runCommand({"collstats":"source"})["wiredTiger"]["creationString"]
backup_test:PRIMARY> creationString
allocation_size=4KB,app_metadata=(formatVersion=1),block_allocation=best,block_compressor=snappy,cache_resident=0,checkpoint=,checkpoint_lsn=,checksum=uncompressed,collator=,columns=,dictionary=0,format=btree,huffman_key=,huffman_value=,id=16,internal_item_max=0,internal_key_max=0,internal_key_truncate=,internal_page_max=4KB,key_format=q,key_gap=10,leaf_item_max=0,leaf_key_max=0,leaf_page_max=32KB,leaf_value_max=1MB,memory_page_max=10m,os_cache_dirty_max=0,os_cache_max=0,prefix_compression=0,prefix_compression_min=4,split_deepen_min_child=0,split_deepen_per_child=0,split_pct=90,value_format=u,version=(major=1,minor=1)
backup_test:PRIMARY> db.createCollection("dest", {storageEngine:{wiredTiger:{configString:creationString}}})
{ "errmsg" : "exception: 22: Invalid argument", "code" : 2, "ok" : 0 }
      Show
      backup_test:PRIMARY> use wt_test switched to db wt_test backup_test:PRIMARY> db.createCollection("source") { "ok" : 1 } backup_test:PRIMARY> var creationString = db.runCommand({"collstats":"source"})["wiredTiger"]["creationString"] backup_test:PRIMARY> creationString allocation_size=4KB,app_metadata=(formatVersion=1),block_allocation=best,block_compressor=snappy,cache_resident=0,checkpoint=,checkpoint_lsn=,checksum=uncompressed,collator=,columns=,dictionary=0,format=btree,huffman_key=,huffman_value=,id=16,internal_item_max=0,internal_key_max=0,internal_key_truncate=,internal_page_max=4KB,key_format=q,key_gap=10,leaf_item_max=0,leaf_key_max=0,leaf_page_max=32KB,leaf_value_max=1MB,memory_page_max=10m,os_cache_dirty_max=0,os_cache_max=0,prefix_compression=0,prefix_compression_min=4,split_deepen_min_child=0,split_deepen_per_child=0,split_pct=90,value_format=u,version=(major=1,minor=1) backup_test:PRIMARY> db.createCollection("dest", {storageEngine:{wiredTiger:{configString:creationString}}}) { "errmsg" : "exception: 22: Invalid argument", "code" : 2, "ok" : 0 }
    • Quint Iteration 6

      I would like to be able to create a collection with the same wiredTiger collection options as an existing collection. If I take the wiredTiger.creationString field from the collstats command to pass to the createCollection command it fails with:

      Error creating `test.test`: { "serverUsed" : "127.0.0.1:27502" , "errmsg" : "exception: 22: Invalid argument" , "code" : 2 , "ok" : 0.0}

      and write the following to the MongoDB log:

      session.create: unknown configuration key: 'checkpoint': Invalid argument

      It seems that the collstats output contains options that are not valid at the collection level.

            Assignee:
            max.hirschhorn@mongodb.com Max Hirschhorn
            Reporter:
            cory.mintz@mongodb.com Cory Mintz
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              Created:
              Updated:
              Resolved: