RAID block size and Lightroom

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• 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.

• Block size and cannot run the snapshot-

  Hello

  I have the following LUNS carved to my windows 2008 r2 SQL box.

  ESX 4.0

  Lun1 - size - 230GB of OS 1 MB size block

  LUN2 - DataUn 4 MB block size - 950 GB

  LUN2 - size - 500 GB of block DataB 4 MB

  LUn3 - records the block size of 1 MB - 200 GB

  When I try to run a backup, veeam, got the following error

  < Unspecified file name > file is larger than the maximum size supported by the data store ' < indeterminate datastore >

  What could be the cause and how to fix it so I can run a backup on this virtual machine. How big a LUN should I create?

  Joe.

  Check this KB, would be useful

  http://KB.VMware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalID=1012384

  -A

• What are the advantages and disadvantages for the largest block size and

  What are the advantages and disadvantages for the largest and the smallest block size block size?

  Smaller size of block

  Benefits
  Relatively large GoodHas air space due to metadata
  (i.e. block the header).
  Not recommended for the outline. He could only
  be stored for each block, or worse, a few lines line
  If one line does not fit into a block, for small lines with a lot of chance of chaining
  access.
  Reduced block contention.
  Disadvantages
  A relatively large air space due to metadata
  (i.e. block the header).
  Not recommended for the outline. He could only
  be stored for each block, or worse, a few lines line
  If one line does not fit into a block of chaining.

  Larger size of block

  Benefits
  Lower overhead, so there is more
  room to store the data.
  Allowed to read a number of lines in
  the buffer with a single I/o cache
  (according to the size of line and block size).
  Good for very large or sequential access
  lines (for example, LOB data).
  Disadvantages
  Waste of space in the buffer cache, if you
  random access to small lines and have a large block
  size. For example, with a size of 8 KB block and 50
  size byte of the line, you will lose 7 950 bytes in the buffer
  When you make a random access cache.
  Not good for the index used in an OLTP blocks
  environment, as they increase the claim to block
  on the leaves of index blocks.

• ESXI4 installation, best practices RAID, Stripe size, VD, the partitions?

  Hi all

  I have server Dell Poweredge PE2970 with PERC6 / I and PERC6/E RAID controllers.

  and the Bay of Dell Powerwault MD1000 storage.

  PERC6 / I is conducted 6 x 150 GB, 10,000 rpm, SATA drives. (560 GB RAID 6) and,

  PERC6/E is engine x 15 x 1 TB 5400 RPM, SATA drives. (12 to RAID 6)

  This combination is used to provide iSCSI and NFS services for film and music production environment.

  I plan to create 3x100Gb, 1x200Gb, and 1x60Gb virtual disks of 560 GB RAID 6 array.

  60 GB to install VMware ESXI4 and StorMagic SvSAN.

  100 GB for virtual machines (Linux, Windows, NFS, AD, backup, servers etc.)

  100 GB for Audio iSCSI (work Pro Tools disk)

  100 GB for video iSCSI (work Pro Tools disk)

  200 GB for iSCSI Virtual Instruments (used by Pro tools)

  and 6 x 2 TB of storage, backups, etc.

  How to create these virtual disks when I create RAID arrays?

  What Strip size to use?

  How about this VD 60 'system' VD ESXI4 and SvSAN, or 100 GB 'virtual machine' for other servers?

  I had to do it like this, or should I create a 160 GB VD, for all the servers and facilities of ESXI?

  or should I create a VD to each their own?

  I mean like VD 1 GB for ESXI4, 25 GB (two partitions of 5 GB and 20 GB) VD for SvSAN, VD (two partitions 40 GB and 40 GB) 80 GB for Windows server.

  5 GB VD for Audio Linux NFS, 100 GB VD for iSCSI server, etc. In this solution, I could choose a different distribution for each VD size.

  I know this isn't the best solution, and in the future I could replace all the drives 10,000 rpm with fast SSDS 32 GB (128 GB RAID6)

  for the system and servers, and have a second table MD1000 for iSCSI disks dedicated 10,000 rpm. But for now, it's how to deal with.

  All suggestions and advice are welcome.

  Concerning

  Petzu

  We create a 5120 MB vd for esxi installation.  5121 actually like the perc bios rounds.

  Then we can recreate all installing esxi without touching anything else.

  The virtual machine are limited in the size of their maximum vmdk. For example, you could create just the minimum number of data warehouses.

  Keep it simple and straightforward unless you have a specific reason to diverge.

  Let me paraphrase what mentions a dev to vmware, (it was in what concerns the amendment of vmfs default block size and I like to think that it is also applied to vmware Scheduler, a great great piece of programming). "We optimize, so you can just go with the default value and know he's going to do the right thing."

  The default size of the distribution is a good compromise, optimized to work under most workloads; different size block sizes can have radically different performance based on the workload characteristics.  The default value works well and 2008 and later versions of the most recent vm of windows properly aligned on 64 k.

  Dell has a ton of technical documents by comparing the performance of raid levels.  Already a few months that we are talking about performance raid comparng and I whimper.

  If it needs to be super fast I pick up 10, lots of space 5, more reliable but more space, and then from 10 to 6.

  Dell technology said that most of the people raid 5, because disk is so reliable.

  We use raid 6 for reliability on volumes in addition to 12. Depending on the level of incorrigible error on a raid of 12 to rebuild.

  http://m.ZDNet.com/blog/storage/why-RAID-6-stops-working-in-2019/805 (which implies an ure 12^{14 and I think I'm 12 years old company records}15 ure).

  The backup raid controller cache battery alleviates some of the supposed raid 6 over raid 5 performance drops.

  In your case I use raid 5 for warehouses of operational data for performance and raid 6 for the backup data store.

  In addition a synthetic benchmark not always told you the return you will get with a real application in an operating system.

  When we first virtualized mysql, according to our benchmark iometer, we thought performance would be an order of magnitude worse. In practice, they were good enough that we went hog wild and virtualized of many others.  You should always be aware of the performance characteristics of your application.

  For example, we have two pairs of distinct mysql replication, and each of them get their own volume 5 disc on the md1000 even.

  Heterogeneous workloads on the same volume of mixture, specifically servers oversees with lots of random file io and vm with support for example sequential access will hurt the performance of the database.  ESXI 4.1 storage io control feature is designed to mitigate this.

  The funniest on the axles and raid controllers, it's that sometimes a lot of slower batteries will out perform less higher speed axes.

  If you think you aggregate read the md1000 on performs faster small volume.

  Battery learn cycle is running all 90 days or more and turn off the cache writeback, which hurt performance. He must run because the cache battery degrades over time, and he needs to know when the battery lasts less than 24 hours.  It determines this by measuring the time it takes to recharge.

  We have never noticed this or necessary to adjust it to our server by default openmanage farm, I just thought I would mention it because we were on a subject very.

  Install openmanage for esxi.  Disable the cache on individual disks, as this cache is not battery backup.

  Don't forget to document your config, because it won't remember what you were doing when you do a recovery.

• 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

• SAN LUNS vs. VMFS Block Size block size

  Hi all

  I searched a bit and you read some documents on VMFS block sizes and alignment. However, I'm still a little confused. I think I get the concept of aligning vmfs partitions and how the block size affects max vmdk/size of the file on a partition. When creating new virtual disks and LUNS on my SAN, however, I can choose the sizes of different block there, as well.

  Choose size of block even when you create a SAN LUNS as VMFS partition that will reside on this subject? There is also 'the band height' and I wonder how it might affect things. The default value is 64 k, which I was using.

  Thank you very much

  Take a look at: disk partition alignment

  Block is not to same size, cause VMFS use big block (not available at the level of storage).

  André

• 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

  -

• Oracle and the segment size of external storage block size

  Hi all.
  I have a storage which will host an instance of Oracle data files. The RAID should be configured and for this, my colleague needs set the segment size. Its options are 16 k, 32 k, 64 k.
  The db Oracle will essentially the size of block 8 k value. The oracle block size must be synchronized with the size of the minimum of 16 k segment?
  How this change may affect performance?
  Thank you.

  rp0428, nice answer.

  Balu, as I suggested use 64K and call it a day.

  HTH - Mark D Powell.

  Edited by: Mark D Powell on August 10, 2012 12:12

• SSDS must be similar in size and type to raid 0?

  SSDS must be similar in size and type to raid 0?  I have a 2009 MBP 2.66 bicoeur.  SSDS are an old sata 250 GB Samsung 850 pro III and an all new Intel 160 GB (320 series) sata II.  The hard drive on the MBP interface is 3.0 GB/s sata optical drive interface is 3.0 Gbit/s

  Different size, different brand, sata II issue III v?

  If it works, it will be almost double the read and write rates, I understand.  I am aware of the increased risk of data loss.  Will only use for backup data.

  How is it difficult to set up raid 0?  I don't know the first thing about raid 0, 1, 2, 3?

  Thank you

  Stu

  If it works, it will be almost double the read and write rates, I understand.

  RAID offers for the SECOND and the following read/write of the same LARGE file acceleration and not otherwise. Any intervention of reading or writing in different files eliminates the acceleration. Any acceleration is much more dramatic on rotating discs, because it can eliminate some of the 10 ms or more long 'dead time' while the reader is a new track and the controller must wait for the correct data go in the position under the read/write head. Acceleration on the low-latency SSDS is far less dramatic.

  The system drive / boot is particularly bad choice for a RAID, it reads and writes small random files in all directions. Who will get no acceleration.

  You can best be served by creating a workflow that allows separate readers for the source files to Destination files, files of zero and drive system / boot.

  --------

  RAID is usually done on the disks that are exactly or nearly the same. Too slow response of one of the discs can cause the RAID failure.

  RAID support has been removed the disc utility GUI in 10.11 ElCapitan, probably because too many casual users got into trouble with the built-in GUI functions. You need to use the diskutil command in the Terminal, or buy the SoftRAID(4) package.

• 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.

• Hello; During the installation of the Software Photoshop and lightroom, there s blocked has the known installation 'wait '. What needs to be done?

  Hello; During the installation of the Software Photoshop and lightroom, there s blocked has the known installation 'wait '. What needs to be done?

  Please read https://forums.adobe.com/thread/1499014

  -try some steps such as changing browsers and disable your firewall

  -also clear the cache of your browser if you start with a fresh browser

  -check the file hosts for blocked entries https://forums.adobe.com/thread/1912777

  http://myleniumerrors.com/installation-and-licensing-problems/creative-cloud-error-codes-w ip.

  https://helpx.Adobe.com/creative-cloud/KB/creative-cloud-desktop-application-failed.html

  http://helpx.Adobe.com/creative-cloud/KB/failed-install-creative-cloud-desktop.html

• 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.

• 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.

• I have blocked the entry of "Photoshop and Lightroom.

  PC computer with Windows 7 operating system.

  As this forum is in English only, language I don't speak, not the translation with Google. I apologize for bad expressions.

  I have blocked the entry of "Photoshop and Lightroom" and I get a sign that says "renew your membership". The same has been done in a timely, is contained in the files of my account 'Adobe Store & APAC LATAM' both the renovation, as charged by Adobe.

  I tried to enter the chat and I have displayed permanently, for two weeks, which is closed, impossible to communicate by telephone. The clock is ticking and I'm paying for a service that does not pay me Adobe and has blocked all ways to contact and make a claim.

  Today, wanting to give a solution to the problem, I uninstalled PS and LT, while trying to download the program, "I upgraded my account," I did a new subscription, but I do not download programs. What can I do?

  You can also try:

  If the applications in the creative cloud display 'Trial' or 'Buy now' in front of them or when you start a creative Application of Cloud like CC Photoshop or Indesign CC it comes up with a pop up to 'Renew your membership', please see:

  Creative Cloud applications unexpectedly back in trial mode

  https://helpx.Adobe.com/Creative-Suite/KB/trial--1-launch.html