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This article introduces what is the difference between EMC VMAX AF all-flash memory array and VMAX full-plug SSD, the content is very detailed, interested friends can refer to, hope to be helpful to you.

To put it bluntly, I don't know. However, from the relevant data, from a technical point of view, it seems that there is not much optimization for full SSD.

Let's take a look at the performance metrics, 0.5ms latency, which is OK. But many all-flash arrays designed from scratch can do 0.3ms. Therefore, latency is certainly not an advantage of VMAX AF. However, the bandwidth of 150GB/s is still very high, even exceeding the 100GB/s promoted by DSSD D5, which is mainly the result of the high scalability of VMAX.

Although SSD of three capacities is supported, the minimum unit of capacity expansion is 13TBu (available capacity). That is, package sales. From the analysis of the data, the V-Brick should use a 2.5 "high-density disk frame (DAE), the one with the 3U/120 bit."

The VMAX AF comes in two models, the VMAX 450 and the VMAX 850. The name was so uncreative that 3PAR bloggers laughed at EMC for copying their names. Because HP 3PAR's high-end all-flash array models are 20450 and 20850, . According to the different software, EMC is divided into F series and FX series, F contains commonly used software functions, FX contains almost all software functions, especially rich disaster recovery features, but ProtectPoint needs to pay separately. There is no re-deletion function, and the compression feature will not be available until the first half of the year. We can see that the maximum capacity is still around 4PB, which, like the VMAX 400K, is mainly due to memory constraints (reference analysis: why does the EMC VMAX 400K support 5760 disks, but only support 4PB effective capacity? Because VMAX3 keeps the metadata in memory in order to achieve faster snapshots, learning XtremIO

Therefore, we also learn from XtremIO to wrap the iCDM scheme. However, because re-deletion is not supported, there are still fewer bright spots than XtremIO. However, rich data services are the biggest feature of VMAX AF.

Although the VMAX AF is called 450,850, but the product positioning, EMC is not 3PAR 20450 and 20850. Instead, VMAX 450s are calibrated with 3PAR 8450 and VMAX 850s with HDS G1000. It is probably that EMC is not optimistic about 3PAR high-end all-flash array.

The online compression that will be supported can do the data compression at 2:1. There is hardware acceleration (I don't know whether to add a new compression card, but it is also optional). It is not global, and the system determines whether it is worth enabling compression according to the application compression ratio. Can be used with SNAPVX and SRDF.

In terms of features, the biggest difference between VMAX AF and VMAX3 is that FAST.X is not supported, because only flash memory is left, so all are diamond services. However, this is tantamount to giving up support for isomerization and not supporting third-party arrays. However, support for CloudArray's cloud gateway is retained.

This time VMAX AF advertises support for 3.8TB 's 3D NAND SSD, and says that this 3D NAND SSD cannot be used on mixed VMAX3, but is dedicated to VMAX AF. That is, the real optimization for ALL FLASH is mainly here. Considering that the number of erasure and writing times of 3D NAND may be low (3D generally uses TLC, right? ), so Brother Watermelon speculates that VMAX AF takes advantage of its large memory to minimize the data that fall out of the disk. In other words, frequently written data is not dropped, so overwrite is consumed at the cache layer. And often read data can actually be off the disk, because flash memory is not slow to read, if read cache miss, and then go to flash memory to read, in fact, more waste of time. Therefore, EMC has a technology called FlashBoost that allows bypass to read cache globally.

In terms of price, EMC gives several principles. If you want to add two separately quoted software to the F-series, it is better to report directly to the FX series; if VMAX AF already supports compression, it is better to configure a hybrid array with 30% flash memory than to configure all-flash memory directly; and, no matter what capacity SSD the VMAX AF uses, its $/ GB plus is the same.

About EMC VMAX AF all-flash memory array and VMAX full plug-in SSD what is the difference to share here, I hope the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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