One of the major improvements with the CacheCade Pro version is that write data can also be cached. The write caching is a tremendous accelerator for any HDD array, be it large or small. One of the major weaknesses of any storage medium is writing, especially in mixed read/write scenarios. An unfortunate side-effect of writing is that it slows down reading. For instance, if a large file was being read off of the array, and then a small write was issued simultaneously to the array, the speed of the large read would suffer drastically as the latency is affected.
The concept of caching the writes will be to keep the writes on the SSD layer until such a time that the write can be passed along to the HDD array as unobtrusively as possible. Not all write data will be cached. The write data is also going to be monitored for “Hot” status, and cached appropriately. This allows for total optimization of HDD I/O traffic.
- LSI Amortization Schedule Plus all versions serial number and keygen, LSI. Lsi Cachecade Keygen Download No Virus. How to enable LSI CacheCade 2.
- May 02, 2012 How to enable LSI CacheCade 2.0 Pro 30 day trial, demonstrated on an LSI 9265-8i RAID adapter.
An area that is sure to benefit from this by a large margin is in raidsets with parity. A drawback of these types of RAID is that they can be very slow at write operations. The main cause of this is that for each write operation they actually have to read, then modify, then write, the data. This can cause significant performance problems. So RAID 5 and 6 and other raidsets with data security or duplication will be able to handle the more demanding process of read-modify-write much easier. This can lessen some of the performance disadvantages with RAID 5 and 6, allowing more performance at the back end of the storage system. This is made possible because the majority of the application IO requests from the base HDD volume are being handled by the SSDs where the data is being cached.
When caching the write data, data redundancy and integrity becomes a very large concern. The release of CacheCade Pro will also bring with it the inclusion of redundant raidsets for use with the caching volume. The SSD volume will be able to be configured in a RAID 0 for optimum performance when data availability isn’t as important as raw speed (ie. if a SSD fails). RAID 1 and RAID 10 are also available for ultimate data protection. In a follow-on release, RAID 5 will also be introduced for the SSD caching volume.
Buy a MegaRAID CacheCade Pro Software Pack ( v. 2.0 ) - license or other Network Management Software at CDW.com. Download Lsi Sas 3000 Series 4 Port With 1064e serial keygen nocd crack activation license. LSI CacheCade Pro 2.0 / FastPath FAQ has arrived. Lsi LSI00248. CacheCade allows for very large data sets to be present in cache and. For this you will need the controller card's serial and safeID from.
Upon any type of failure, be it a power failure or otherwise, the controller will copy the write data onto the base array upon power up. This is a considerable advantage of using SSDs with their non-volatile flash. When deleting SSD volumes, the controller will first flush all cached write data to the base array.
The overall goal of the CacheCade Pro is to meld an SSD (or several) and an HDD array into one cohesive unit. The key is to utilize the strengths of each solution and not just the SSD. Intelligent caching improvements in the code, compared to the previous generation of CacheCade, have begun to leverage the strengths of both the HDD array and the SSD cache appropriately. Not all hot data should be cached in all scenarios. There are certain scenarios where the HDD array will actually perform either well enough, or better than the SSD, so caching isn’t necessary. It is important for the algorithm to be able to detect these patterns, so that the amount of data that is cached can be minimized in amount, yet maximized in performance overall. This type of optimization is going to be much more efficient as it will result in less wear to the caching SSDs, and also incur less overhead. A nice benefit of this is that it can create additional room for caching.
ANSWERING CONCERNS
SSDs are known for their reliability and performance, especially the enterprise class variants, however, users have to keep in mind that they DO have a lifetime much like any other device. With extremely high write loads over an extended period of time, even enterprise SLC drives will eventually wear out. RAID-1 and RAID-10 are important because they provide non-stop data availability, even in the event of an SSD failure. If the SSD were to fail, simply replace the SSD and the rebuild will begin automatically. If the user were to have an assigned hot spare, the rebuild would begin automatically with no user intervention. This provides yet another layer of data security.
CacheCade Pro supports to 512 GB of cache, and LSI plans to expand support up to 2TB in total in a future product update. You can use up to 32 SSD devices if you like, and performance does scale very well with the addition of more devices, as we will show shortly. A nice addition with this version is the ability to selectively choose which Base HDD Arrays (one or more) are assigned to the CacheCade SSD Volume. There is definitely a lot of flexibility there for the administrator to fully optimize the system.
One could gain the benefit of over-provisioning, thus multiplying the SSD endurance, simply by using several large capacity SSDs. Since there is a limitation to the amount of SSD space that can be used by the controller, any excess capacity of the SSDs will simply be left unformatted and unused, handily becoming a nice bit of over-provisioning.
A commonly used scenario would be several small capacity disks that would allow excellent performance scaling, and doing it with small cheaper devices. One of the big takeaways of this software is that ultimately you are looking to leverage the speed of SSDs with the capacity of HDD, as cheaply as possible. This allows one server to essentially expand to do the work of several.
NEXT: Exploring TCO
~ Introduction ~ Basic Concepts and Application ~
~ Enter Write Caching ~ Exploring TCO ~ Test Bench and Protocol ~
~ Single Zone Results ~ Overlapped Region Results ~
~ Real World Results and Conclusion ~
Open Box: Images shown are from the NEW version of this item and are for reference only. The actual Open Box product may differ in packaging and included accessories, but has been tested to ensure basic functionality.
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- LSI00292
- MegaRAID CacheCade Pro 2.0 Software Pack w/ FastPath - physical key for 9260/9280 Series
- Compatible Products:
- MegaRAID SAS 9260-4i (LSI00197 & LSI00201)
- MegaRAID SAS 9260-8i (LSI00198
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Ships from United States. Most customers receive within 2-8 days.
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Ownership: 1 week to 1 month
Make sure you pick the right SSD7/2/2015 5:24:59 PM
Pros: When it works, it works great. Care must be taken in the setup of the initial HDD array first. There are Youtube videos on how to setup the Cachecade properly. Watch them first or you will risk blowing out your install.
Cons: I downloaded the Oct 2014 PDF of certified SSDs that LSI endorses for the use of Cachecade; however, many of them are very high priced and since 2014 are no longer available due to the fast moving SSD brands and flavors available.
I tried the Samsung 850 EVO with the latest firmware (2.x ending in 3835) and MSM (ver 15); and when the SSD Virtual Drive is enabled fir use as a Cachecade drive, it immediately generates a series of log entries
-- error 113 'unexpected sense PD {drive number} CDB = followed by a bunch of numbers'
A call to LSI Tech Support was very helpful. The advice was to work solely off of the hardware compatibility list - but in the absence of that, the support-guy recommended the Samsung 840 EVO (which is no longer for sale in most stores) or the Samsung 840 EVO PRO. So I have ordered 2 of them for testing.
Support also said that the CDB errors are responsive in nature and that the controller is logging that its commands to the drive are not working. Hence, this explains why after enabling the SSD as a Cachecade the Windows 2008R2 server freezes when opening Windows Explorer the file manager, or crashes.
In the meantime, these other drives have been tested and DO NOT WORK generating the same CDB errors after being enabled on the controller.--
AMD Radeon SSD R7 series (Radeon-R7SSD-240G)
Patriot Blaze PB240GS25SSDR P-1520SD PE000341
SANDISK Ultra II SDSSDHII-240G
PNY CL4100 Series SSD7SC240GCL4 240GB SATA III
Again - check the Mfr Hardware Compatibility List FIRST when choosing your SSDs
I tried the Samsung 850 EVO with the latest firmware (2.x ending in 3835) and MSM (ver 15); and when the SSD Virtual Drive is enabled fir use as a Cachecade drive, it immediately generates a series of log entries
-- error 113 'unexpected sense PD {drive number} CDB = followed by a bunch of numbers'
A call to LSI Tech Support was very helpful. The advice was to work solely off of the hardware compatibility list - but in the absence of that, the support-guy recommended the Samsung 840 EVO (which is no longer for sale in most stores) or the Samsung 840 EVO PRO. So I have ordered 2 of them for testing.
Support also said that the CDB errors are responsive in nature and that the controller is logging that its commands to the drive are not working. Hence, this explains why after enabling the SSD as a Cachecade the Windows 2008R2 server freezes when opening Windows Explorer the file manager, or crashes.
In the meantime, these other drives have been tested and DO NOT WORK generating the same CDB errors after being enabled on the controller.--
AMD Radeon SSD R7 series (Radeon-R7SSD-240G)
Patriot Blaze PB240GS25SSDR P-1520SD PE000341
SANDISK Ultra II SDSSDHII-240G
PNY CL4100 Series SSD7SC240GCL4 240GB SATA III
Again - check the Mfr Hardware Compatibility List FIRST when choosing your SSDs
Ownership: less than 1 day
Pros: None currently
Cons: Make sure you get the correct key. For some reason newegg only carries one of three different keys made for different models and then will change you restocking fees if you get the wrong one.
Ownership: 1 day to 1 week
Another Costly Addon To Increase Performance11/2/2014 12:00:40 PM
Pros: Enables the use of SSD's in an either RAID 1 or RAID 0 mode to act as a optimization, cache. It's not a replacement for the battery backup unit.
Cons: LSI has all these 'add-on's' that are nickle and dime-ing customers to death. The Battery Backup Unit (BBU) is separate and must be replaced annually, the cachecade feature is another add-on, and wait, there's more -- if you want to do recovery, you need to buy the LSI00246 part 'MegaRAID Recovery Software'. I mean really, this should all be part of the cost of the card. It's like they got their pricing model from car dealerships it's so slimy.
Overall Review: Works great, so far it appears to have improved performance quite a bit. Now the bottleneck is the network, not the SAN/RAID.
Ownership: 1 day to 1 week
Pros: Works as expected on correct raid controllers
Cons: None.
Overall Review: Be sure to purchase the hardware key if your LSI controller has the port for it, there is a software license from LSI if you have a more modern card like the 9261. Newegg does not carry the part number.
I had to source from CDEW.
I had to source from CDEW.
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