block size histogram

Similar Questions

• iSCSI LUN Block Size

  Hello...

  I asked this question already in the German part of this community, but got no answer...

  On the ReadyDATA, it is possible to adjust the block size, then host and client can use the same block size:

  http://KB.NETGEAR.com/app/answers/detail/A_ID/24200

  But what is the block size used on OS 6? It is not possible to adjust this value...

  (Sorry for my bad English)

  We currently use 512 b to the size of the block. There is currently no option to change this in the user interface, but it would be a great feature request.

• block size / real-time

  Hello

  I know that some of you have already had this kind of problem, and I tried to solve the mine with your solutions, but it work yet... My problem is the following: I have to stop acquisition with a global variable of pre-definied. At the beginning of the program to choose the acquisition (in second) time, thanks to the action module. Then begins as and when the program notice a variation of the input (defined), he begins to write values to a folder and save the data.

  After the relay module, I put a module based on the time and choose "measurement in second time. The statistical module take the max and min and then do a subtraction (max - min) to get the real acquisition time (which begins with the combi-relaxation). I use the formula In (0) > global variable (pre-definied) and then an action that stops the measurement when the variable global (acquisition time) is more than.

  I want to have 2 seconds of time of acquisition, but the routine often stops around s 2.047, but is not specific enough (with the size (512) to block automatically to 1000 Hz)... So, I tried to change the basics of time for block size = 1 and sample rate = 1000 (for all: driver, dasylab and acquisition card). But now the acquisition time doesn't seem to match with the real time...!

  For more information, I use:

  USB 1608G (MCC - DRV)

  DASYLab 12 (evaluation version).

  If you have an idea of what I need to do... An accuracy of 1 ms would be great (as a block size of 1 with sampling frequency of 1000 Hz...)

  I joined the worsheeet below for a better understanding.

  If it could be useful to others... (Fortunately ^^) I found the solution!

  I used the Basic module of time, I chose "time of day" and then, I put the module 'statistics statistical values' and I take the max, min. After that, I put an arithmetic module and "max - min".

  I hope it's ok, but it looks like the right way to find what I was looking for...

• data from the buffer before graph it and block size

  I hope you can help me with this situation because I was collapsed in this situation for two days and I think I see the light in the short time and time is a scarce resource.

  I want to use a NI DaqCard-HAVE-16XE-50 (20KS/sec accordig to the specifications). For data acquired by DasyLab, I use OPC DA system but when I try to get a graphic from the signal I get ugly results.

  I guess the problem is that the PC is not powerful to generate a graph in real time, is if there is a block to save the data, then graph the data without using "write data" block to avoid to write data on the disk?

  Another cause of the problem, it might be an incorrect value for adjusting the size of block, but in my piont of view with the 10 kHz and 4096 block size is more than necessary to acquire a signal of 26 [Hz] (showing the photo). If I reduce the size of the block to 1 signal showing in the graph is a constant in the first acquisition value. Why might this situation?

  Thanks in advance for your answers,

  You don't want to use OPC DA for a device installed with the material. OPC DA is designed for industrial devices low speed, not for cards installed 20 kHz!

  Rerun setup of DASYLab and select the OR-DAQ driver, deselect the NOR-DAQmx driver.

  You must use the analog input OR-DAQ module for talking directly to the camera. You will get the full speed of the device, and the buffering is managed properly.

  I have this card somewhere in a box, and when I used it, it worked perfectly with the NOR-DAQ driver.

• Can't choose one block size, another from 8 KB to 12 c DBCA

  DB version: 12.1.0.2.4 (July 2015, power supply)

  OS: Oracle Linux 6.6

  I tried to create a database using DBCA. But the drop-down list is disabled, as shown below.

  I tried to click on "All initialization parameters" circled in red above. But I don't get to change the value 8 to another

  

  My network connection has been a little slow. But I don't think that this has nothing to do with this issue.

  If you have chosen a database template that includes data files, then the block size will be limited to the size of the block of data that was originally from the model.

• ORA-00344 (impossible to recreate the online newspaper) due to the OSD-04001 (invalid logical block size (BONE 512)

  Windows (well Yes...) Sorry)... Server 2008 Enterprise SP1

  Oracle 12.1.0.1

  I have provided a seller a COLD backup and a BACKUP CONTROLFILE to TRACE file.

  When they go to OPEN RESETLOGS ORA-00344, ora-27040, while they receive the operating system support (OSD-04001)

  I don't have access to the restoration site... so I'll have the seller try things... my next step is to change the db_block_size to 4096 vs 8192

  They are able to build the controlfile: CREATE CONTROLFILE SET DATABASE 'XXXXX' resetlogs noarchivelog

  the issue is in the open air

  It has even deleted the LOG file groups to let the o/s to build it... still committed an error... ideas?

  RESOLVED: redo block size must be a multiple of the db_block_size, which it was (512 k again and 8192 db).

  A few internet searches / messages supposed to reduce the db_block_size... we did it... to 4096 and it worked.  Don't know why it worked in an o/s to 8 k and had to be reduced to another (same configuration... supposedly)

• OS and Oracle block size block size

  [Condition] If the size of the block of BONE [512 b - 64K] is greater than the size of block Oracle [2K - 16K]

  Assume: BONES Block Size: 32K and Oracle block size: 8K

  Quebec: One-to-many relationship will always be true? or block Oracle will use 8K to 32 K, and the rest will be unused? or it will return the error at the time of the creation of the data file?

  This will challenge the relationship "one to many".

  Leader: Oracle logical and physical storage diagram.svg - Wikimedia Commons

  Refer to the basis of the diagram.

  " --------------------< "="" show's="" one="" to="" many="" relation.="" one="" x="" can="" contain="" many="">

  ">-------------------<" show's="" many="" to="" many"="" i.e="" many="" x="" can="" contain="" many="">

  You don't seem to be read or understand what everyone says.

  There is NO such "one to many" relationship. Like I said above

  There is no 'validation of one to many '.

  1. the operating system uses a given block size

  2. you choose an Oracle block size

  All these "one to many" is just the result of the choices you made in #2 above. There isn't any 'validation' that occur.

  This likely diagram shows this relationship based on the recommendation of Oracle to select a block size that is a multiple of the block size of OS. If you do that this diagram will NOT reflect the case of NORMAL use.

  You can't believe everything you see on the internet. Articles/diagrams and others are often from unknown or reliable sources.

  2.

  'Validation' is not any process.

  I just wanted to write the Validation of the theory, the relationship.

  Re-read what I just said again above.

  There is NO validation. There is NO theory of validation.

  All there is is the reality of the block size, you choose and the reality of the OS block size you use. Any relationship between these two values is just a reflection of these two values.

  If you choose two different values, they have a completely different relationship to each other.

  Oracle works with blocks of the Oracle. The operating system works with the BONE blocks. Oracle does not care really what size a block of BONE is in connection with an Oracle block.

• Error ORA-19502 writing on the file ' / INT1/arch/D/arch_1_1629_754400291.dbf ', block number 94209 (block size = 1024), ORA-27072

  Hi all

  In my database DVLUX226, in the alert logs, I get error ORA-19502. partners to archive newspapers. Here are the details:

  Wed Apr 16 18:26:58 2014

  Errors in the /INT1/sw/D/oracle/diag/rdbms/dvlux226/DVLUX226/trace/DVLUX226_arc1_22234.trc file:

  ORA-19502: write error on file ' / INT1/arch/D/arch_1_1629_754400291.dbf ', block number 94209 (block size = 1024)

  ORA-27072: IO file error

  HP-UX-ia64 error: 2: no such file or directory

  Additional information: 4

  Additional information: 94209

  Additional information: 638976

  Wed Apr 16 18:27:11 2014

  ARCH: Stopped archiving, error occurred. Will continue to retry

  ORACLE Instance DVLUX226 - check-in error

  ORA-16014: log 3 sequence # 1629 not archived, not available destinations

  ORA-00312: wire 3 1 online journal: ' / INT1/oraredo2a/D/DVLUX226/redo03.log'

  Errors in the /INT1/sw/D/oracle/diag/rdbms/dvlux226/DVLUX226/trace/DVLUX226_arc0_22231.trc file:

  ORA-16014: log 3 sequence # 1629 not archived, not available destinations

  ORA-00312: wire 3 1 online journal: ' / INT1/oraredo2a/D/DVLUX226/redo03.log'

  SQL > select * from v version $;

  BANNER

  --------------------------------------------------------------------------------

  Oracle Database 11 g Enterprise Edition Release 11.1.0.7.0 - 64 bit Production

  PL/SQL Release 11.1.0.7.0 - Production

  CORE Production 11.1.0.7.0

  AMT for HP - UX: 11.1.0.7.0 - Production Version

  NLSRTL Version 11.1.0.7.0 - Production

  Please let me know how can I manipulate this alert as seems its related archive.

  Kind regards

  Michel

  > - rw - rw - 1 int1orad s/n 99222528 Apr 15 15:27 arch_1_1628_754400291.dbf

  > - rw - rw - 1 int1orad s/n 99222528 Apr 18 03:24 arch_1_1629_754400291.dbf

  What happened between Apr 15 15:27 and 18 April 03:24?

• The current block size for a store of data in VMFS3 is 4 MB. Must upgrade thedatastore to VMFS5 and wants to change the block size of 1 MB

  The current block size for a store of data in VMFS3 is 4 MB. Must upgrade thedatastore to VMFS5 and wants to change the block size of 1 MB

  help me on this

  Create a new data store VMFS5 with a block size of 1 MB. Migrate all virtual machines store data to the new data store, and then delete the VMFS3 data store.

• storage on the block sizes and vmfs5 issue

  We just bought a new table with a feature called FlashDisk SSD read caching.

  the implementation of suppliers of this technology is the following: it basically puts cached applications frequently read blocks that are 16 KB or smaller in dedicated controller SSD, up to 1.6 TB per controller.

  We worry about what we paid extra money for SSD read cache and I was wondering if it will ever come into play because VMFS5 file system uses the block size of 1 MB.

  WE have Oracle DB currently set to use 8 k block size.  Now if VMFS collects the Oracle 8 KB please and puts them in blocks of 1 MB, then Im I right to believe that the read SSD cache pool will never be used?  y at - it a way to allow the Oracle 8 KB blocks to get to take advantage of the SSD cache using file vmfs5 reading system?  or is the necessary RDM here?

  Thank you!

  Now if VMFS collects the Oracle 8 KB please and puts them in blocks of 1 MB, then Im I right to believe that the read SSD cache pool will never be used?

  No, your assumption is incorrect. The size of the block VMFS is only for the sake of allocation/address of the files on the will. The size of the block VMFS has no influence IO issued by the virtual machines.

  This means that a request for/o 8 k of a VM will arrive as an application of e/s of the same 8 KB on the backend storage.

  The VMFS block size is completely independent and transparent to both, the back-end storage device and the behavior of the computers own IO virtual.

• Storage vmotion, between data warehouses when the block size is different

  Hi all

  I would like to know, is it possible to do a vmotion of storage between two data warehouses, when they have different block sizes. The case is as a former vmfs data store 3 which has been upgraded direct to vmfs5 there, but since it has been updated it maintains its own block size. While the newly created vmfs datastore 5 a block size of 1 MB.

  Thus, storage Vmotion will work in this case? It will fail OR will be with degraded performance?

  Finally, storage vmotion is possible even if you do not have a cluster DRS for storage?

  Thank you

  Yes you can!

  Check some info on the effects of block size: http://www.yellow-bricks.com/2011/02/18/blocksize-impact/

• Block size of data store

  Hello

  First time post and quite new to the product.

  Does anyone know why the option of block size to store data in the client default vSphere to 1 MB in size?  I see in the tutorials and blogs, there are options in the updated section in shape for up to 8 MB?

  Thanks for your help.

  Hello, welcome to the communities.

  Here is some information on the sizes of block VMFS and their constraints;

  VMware KB: Block the size of a VMFS data store limitations

  VMware KB: Frequently asked Questions on VMware vSphere 5.x for VMFS-5

  Don't forget, when you upgrade from an earlier version of VMFS, the block size is preserved. Newly put VMFS-5 data warehouses have a unified 1 MB block size.

  See you soon,.

  Jon

• How to shrink thin comments on VMFS5? or change the block size?

  Hi all, I'll try to find a way to reduce invited bloating thin-set in service in an environment VMFS5 all.

  We went from 4.1 to 5.1 and then also vmotioned storage all our newly created vm VMFS5 volumes before you delete the old VMFS3 volumes.  During this operation, everyone has forgotten that one of our volumes has been intentionally assigned to a block size of differnet than all the others for the purpose of narrowing of the guests who had swelled upward for some reason any.  Now, we have no way to create something other than a volume of 1 MB block size which prevents us from doing the cleaning routine.  Is there an alternative way to shrink a guest who does not put offline?

  For those who do not know the procedure that I describe, here's how it works:

  You have a 100 GB comments that has only 10 GB of actual data in it, but because of something after bad temporary files, cleaning up old data, etc., that 100 GB had been used at a point of real files but is now only 10 GB in use. You want to recover which is now 90 concerts waste of space because your thin provisioned VMDK is sitting there at 100 GB in size.  With VMFS3, you could create a volume with a block size that was different from that of the volume on which the guest is currently living.   In our environment were all our 1 MB LUN but one that we kept to 2 MB just for that purpose.   When we were getting a little low on space and found guests such as the one in question, we would run a simple command to write zeros to the entire free space:

  Cat/dev/zero > bigfile; RM f bigfile

  Then all you have to do is storage vMotion the guest at the volume of 2 MB and return to its normal domestic and suddenly the VMDK's 100 GB up to 10 GB, all with no impact on the guest.  Without support for the creation of a file system with a different block size in VMFS5, now I'm not aware of a way to reclaim this space in a way that does not require an interruption of the guest.

  You can select the VMFS version when you create a new data store. With selected VMFS3, you will be able to specify the desired size of the block.

  André

• Change the block size of 1 MB (4 MB or 8 MB)

  Hi all

  I'm in a delemia.  I have an ESXi installed 4.1 vSphere but I used the block of 1 MB by default when the size isstalling ESXi.  I have turned Virtual Machines for some time on this topic and may not all simply re - install the ESXi again.  I am currently in need greater than 256 GB drives in my virtual machines.

  What I read for possible patches to change the 1 MB to 4 MB or 8 MB data store to support more than 256 GB drives is to add to the new temporary HDD on the server and create a new store of data on it with the block size of 4 or 8 MB and then migrate the virtual machines to the new larger block size datastore.  Then re - initialize the original 1 MB data store such as a 4 or 8 MB and migrate to the original data store.

  Two questions about this:

  (1) is my eventual detailed correction?  In other words, I add another, say, 8 MB block size datastore, although I have implemented the ESXi server as a 1 MB? Or will it just automatically initiaize the new temporary data store like 1 MB anything?

  (2) If this correction is possible, the passage of the VMS in a data store from 1 MB to 8 MB data store will have reprecussions?  In other words, move a Virtual Machine with the 1 MB block size to a data store with 8 MB is a problem with this virtual machine?

  Any suggestion would be great.

  Thanks in advance.

  -Dan

  Welcome to the community,

  You can format each data store (which is just a partition with a type of VMFS partition) with a different block size and move the VM back if you wish. However, if your hardware supports ESXi 5.x, this can be an easier way to solve the dilemma, because after the upgrade to ESXi 5.x, you can also upgrade the VMFS3 data store to VMFS5 which supports the file (virtual disk) sizes of up to ~ 2 TB with a unified 1 MB block size.

  André

• Property of block size of the data store

  How to get the block size defined in the configuration of the data store tab. Is there a property, I should be looking. Currently, I tried getting the object managed data store but were not able to get the size of the block that.

  If you are looking for the solution with PowerCLI, take a look at Re: version list VMFS and block size of all data stores

  André