These parameters must be the first parameters in the parameter file, before any HD, SD or FSD.
这些参数必须放在参数文件的首位，位于所有HD、SD或FSD之前。
详见 通用参数详情.
| 参数 | 说明 |
|---|---|
| General parameters | |
| abort_failed_skew=nnn | Abort if requested workload skew is off by more than nnn% |
| compratio=nn | Specify the compression ratio of the data pattern used for writes. |
| concatenatesds=yes | See SD Concatenation |
| create_anchors=yes | Create parent directories for FSD anchor^ 1 . |
| data_errors=nn | Terminate after ‘nn’ read/write/data validation errors (default 50) |
| data_errors=cmd | Run command or script ‘cmd’ after first read/write/data validationerror, then terminate. |
| See also Data Deduplication parameters: | |
| dedupratio= | Expected ratio. Default 1 (all blocks are unique). |
| dedupunit= | What size of data does Dedup compare? |
| dedupsets= | How many sets of duplicates. |
| deduphotsets= | Dedicated^ 2 small sets of duplicates |
| dedupflipflop= | Activate the Dedup flip-flop^ 3 logic. |
| endcmd=cmd | Execute command or script at the end of the last run |
| formatsds= | Force a one-time (pre)format of all SDs |
| formatxfersize= | Specify xfersize used when creating, expanding, or (pre)formatting anSD. |
| fwd_thread_adjust=no | Override the default of ‘yes’ to NOT allow FWD thread counts to be adjusted^ 4 because of integer rounding/truncation^ 5 . |
| histogram=(default,….) | Override defaults for response time histogram. |
| include=/file/name | Includes /file/name inline. See above. |
| ios_per_jvm=nnnnnn | Override the 100,000 default warning for ‘i/o or operations per second per slave. This means that YOU will be responsible if you areoverloading your slaves. |
| journaling parameters: | |
| journal=yes | Activate Data Validation and Journaling: |
| journal=recover | Recover existing journal, validate data and run workload |
| journal=only | Recover existing journal, validate data but do not run requestedworkload. |
| journal=noflush | Use asynchronous I/O on journal files |
| journal=maponly | Do NOT write before/after journal records |
| journal=skip_read_all | After journal recovery, do NO read and validate every data block. |
| journal=(max=nnn) | Prevent the journal file from getting larger than nnn bytes |
| journal=ignore_pending | Ignore pending writes during journal recovery. |
| loop= | Repeat all Run Definitions: loop=nn repeat nn timesloop=nn[s|m|h] repeat until nn seconds/minutes/hours See also ‘-l nn’ execution parameter |
| messagescan=no | Do not scan /var/xxx/messages (Solaris or Linux) |
| messagescan=nodisplay | Scan but do not display on console, instead display on slave’s stdout. |
| messagescan=nnnn | Scan, but do not report more than nnn lines. Default 1000 |
| monitor=/file/name | See External control of Vdbench termination |
| pattern= | Override the default data pattern generation. |
| port=nn | Override the Java socket port number. |
| report=host_detail report=slave_detail |
Specifies which SD detail reports to generate. Default is SD totalonly. |
| report=no_sd_detail report=no_fsd_detail |
Will suppress^ 6 the creation of SD/FSD specific reports. |
| report_run_totals=yes | Reports run totals. |
| startcmd=cmd | Execute command or script at the beginning of the first run |
| showlba=yes | Create a ‘trace’ file so serve as^ 7 input to ./vdbench showlba |
| timeout=(nn,script) | xxxxxxxxxxx |
| Data Validation parameters: | |
| validate=yes | (-vt) Activate Data Validation. Options can be combined:validate=(x,y,z) |
| validate=read_after_write | (-vr) Re-reads a data block immediately after it was written. |
| validate=no_preread | (-vw) Do not read before rewrite, though this defeats the purpose of data validation! |
| validate=time | (-vt) keep track of each write timestamp (memory intensive) |
| validate=reportdedupsets | Reports ‘last time used’ for all duplicate blocks if a duplicate block is found to be corrupted. Also activates validate=time.Note: large SDs with few dedup sets can generate loads of output! |