Data block size

Similar Questions

• 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.

• 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 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

• 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

• Block size of a VMFS data store limitations

  I installed my ESXi 5 server with the default block size

  For the moment, I'm trying to convert the Windows Server 2008 and I have the alert message is: "*.vmdk file is larger than the maximum size.
  supported by the data store.

  It is possible to change the size of the block after the installation of ESXI5?

  Please can you help me because I have converter many server and it is not possible to re install my ESXi server.

  Help, please.

  The screenshot I understand you try to make a volume based cloning and you have deselected (i) and selected a share resource (FAT).

  It is possible to deselect the share (in BOLD) resource and give it a try

  Is - this possibe on a disk based cloning an audit?

  Just to be safe, you have enough space on your data store to perform this conversion, and what version of Converter do you use?

• Increase the capacity of data store, which with the block size?

  Hello

  I am trying to expand my datastore 2 TB, I added a new lun 2 TB of the FC SAN TB 4 even and there is no problem adding this in the existing data store.

  But the existing data store is formatted in VMFS3 with a block size of 4 MB for a maximum file size of 512 GB. But when I try to extend the data store to select the size of the block is set to 1 MB and disabled.
  The measure automatically takes on the size of the original block or wil he get a block size of 1 MB? There are some > 256GB files on the existing data store and I think I'd get a strange behavior, if half of the data store is 4 MB and the other half is 1 MB blocksize.

  Can anyone confirm that the blocksize wil be the same for the measure?

  I can also make a second warehouse 2 TB one manually fracture the virtual machine on 2 data warehouses. is there any advantages or disadvantages to this approach?

  Don't you worry, add an item to an existing data store certainly will not change the size of the block. In any case, if it is an option that you can use two data warehouses, I would. With two distinct data warehouses that you will not only be able to spread the load on each of these LUNS but also avoid the complexity. With ESXi 5 (VMFS-5), a single LUN can grow up to 64 ~ to without needing extensions.

  BTW, a 4MB block size allows 1 TB less than 512 bytes.

  André

• Block size is too small - reformat the data store or create files VMDk 2?

  Hello

  I'm new to VMware and so far I absolutely love everything about her!  Well, I was not too happy when I realized that I can't create more than 256 GB a drive without reformatting the VMFS datastore.   Apparently, I accepted the block size of 1 MB by default during the installation...   I now need to configure a file server with about 500 GB of storage.  The data store with a larger block size (4 MB would be fine for me) reformatting is easy enough?  I am currently working on the first host ESXi 4.1 and will move to set up 2 more hosts in the coming weeks.  I read somewhere on the forum that ESXi 4.0 doesn't let you change the block size by default of 1 MB - is this true or relevant to 4.1?

  Currently, I have only 2 small VMs on that host, and these can be easily saved and put offline for a few hours, if necessary.  When starting the server, I created a single RAID array that holds ESXi and all virtual machines - does that mean that I have to reinstall ESXi in order to increase the size of the block?

  An alternative that I can get to is to simply create 2 255 GB VMDK each and load distribution of storage in the guest operating system (Win 2008).   Performance wise, is a disc more great and better (or worse) than the two smaller disks?

  On a related note, what should I choose for the "Independent" option when you add a new virtual disk?  Default is disabled (not independent).

  Your thoughts, focus and expertise are welcome and will be greatly appreciated!

  Thanks in advance,

  Dothan

  Dothan,

  You should power (after the virtual machine backup) remove the current data store and create a new one with the new block size. I did not have this on ESXi 4.1 again, however, he worked on ESXi 4.0.

  The maximum size of VMDK. If you want ot be able to take pictures, make sure you subtract twice the size of block in GB of the documented maximum size.

  Block size 1 MB--> 254 GB (= 256 GB, 2 GB)

  Block size of 2 MB--> 508 GB (= 512 GB - 4 GB)

  Size of block 4 MB--> GB 1 016 (= 1 024 GB - 8 GB)

  Block size of 8 MB--> GB 2 032 (= 2 048 GB to 16 GB)

  André

  EDIT: Just the KB for the maximum sizes. http://KB.VMware.com/kb/1012384

• How to create a store of data with the small block size

  Hello

  I want to create a data store on two 160 GB drives. All the VI Client allows me to do is to create a data store of whole disc with 1 MB block. But for reasons of performance with the virtualized Oracle RAC, which is 8K organized, I want to go down to a smaller block size. But how?

  Is it possible to split my drive to (lets say) four parts, each with a smaller block size and putting them all together like extends in a data store? To create partitions with fdisk does not work, as the VI Client wants to use the unpartitioned disk. Any ideas?

  Robert

  Hello

  It is not possible. The smallest block size is 1 MB on a VMFS partition.

  Best regards

  Lars Liljeroth

  -

• Size of data block

  Storage of Data Type: dynamic Clac
  Store
  Label only
  Store & Clack Dynamics
  Shared data
  
  As number of block in Essbase is calculated by multiplying the number of members in Sparse dimension and number of cells in each block is calculated by multiplying the number of dense dimension members
  
  
  My question is that
  
  The effects of type of data storage because of the number of cells in each (Dense) block of data and block (Sparse)
  
  For example
  A sparse dimension a total 60 members but off them only 40 members have property stored for the data block will be created on the basis of 40 or 60 members?

  Blocks will be for members only, where the data is stored, if you think about why store something that does not exist.

  See you soon

  John
  http://John-Goodwin.blogspot.com/

• 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...

• 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.

• 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.

• VMware ESXi 5.1.0 VMFS5 maximum data store size

  Hi all

  I read white papers on VMFS and I get conflicting answers on the maximum size of a VMFS5 data store.

  We are using a Dell EqualLogic PS6100 and linking the LUNS via iSCSI for host servers.

  I need to create a data store TB 4 for my file server reside on.

  (A) is it possible?

  (B) are there performance problems with the largest data warehouses such as I want to do.

  Block sizes C) must be modified to mount a data store of this size and how you do it.

  Any idea or article links would be greatly appreciated.

  Keith

  (A) Oui it is possible but you will need to use a RDM - ESXi 5 allows access to 64 TB but the size of the virtual disk is always capped at 2 TB - 512b

  (B) you must not

  (C) with ESXi 5 block size is no longer a variable that you define for a VMFS data store