DBA_Vishal
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XtremIO and Exadata

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Please share if Oracle exadata and XtremIO share some common features and can the clients going for exadata consider XtremeIO ?

Best regards,

Vishal

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8 Krypton

Re: XtremIO and Exadata

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Hi Vishal,

Oracle Exadata storage (with High Performance or High capacity SAS Disks) and XtremIO (All -Flash Array) storage are built on different technologies/architectures and hence not many similarities are there. There are many unique features  of Exadata and  XtremIO. You may check in the embedded link (mentioned before). The only similarity I can think of is the compression algorithm. Oracle has HCC (hybrid columnar compression) within Exadata while XtremIO has New inline, always-on data compression – up to 4X more usable capacity in database environments. Oracle Exadata can achieve a compression rate of 3X (though they claim 8X) . Also, HCC does not work with all data objects and it takes time to decompress in RAM for queries thereby degrading DB performance. But in XtremIO the compression is inline (real-time on XtremIO CPUs not the database host) within the storage array and hence there is no performance penalty. You may click here to understand the real story on Exadata HCC.

To understand the drawbacks of Exadata vis-à-vis EMC products , you may read my blog here. Also, XtremIO array always maintains consistent latency, which enables Oracle chores to be used optimally and hence XtremIO reduces Oracle Licensing costs as the usage of the number of chores get reduced drastically.

For more great features of XtremIO , you may click here and download the EMC XtremIO brochure.

Regards,

Indranil

4 Replies
8 Krypton

Re: XtremIO and Exadata

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Hi Vishal,

Oracle Exadata storage (with High Performance or High capacity SAS Disks) and XtremIO (All -Flash Array) storage are built on different technologies/architectures and hence not many similarities are there. There are many unique features  of Exadata and  XtremIO. You may check in the embedded link (mentioned before). The only similarity I can think of is the compression algorithm. Oracle has HCC (hybrid columnar compression) within Exadata while XtremIO has New inline, always-on data compression – up to 4X more usable capacity in database environments. Oracle Exadata can achieve a compression rate of 3X (though they claim 8X) . Also, HCC does not work with all data objects and it takes time to decompress in RAM for queries thereby degrading DB performance. But in XtremIO the compression is inline (real-time on XtremIO CPUs not the database host) within the storage array and hence there is no performance penalty. You may click here to understand the real story on Exadata HCC.

To understand the drawbacks of Exadata vis-à-vis EMC products , you may read my blog here. Also, XtremIO array always maintains consistent latency, which enables Oracle chores to be used optimally and hence XtremIO reduces Oracle Licensing costs as the usage of the number of chores get reduced drastically.

For more great features of XtremIO , you may click here and download the EMC XtremIO brochure.

Regards,

Indranil

8 Krypton

Re: XtremIO and Exadata

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Fully agree with Indranil.  Exadata and XtremIO is not apple-to-apple comparable products as XtremIO is designed for pure flash architecture maximizing flash read/write performance, and Exadata is not.

Exadata can be comparable to the new VNX, both can be configured with either mix of flash and disks, or can be configured with all-flash.

8 Krypton

Re: XtremIO and Exadata

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There was a recent thread on an EMC internal email list about a customer who used active Data Guard to replicate from Exadata to XtremIO. But why would anyone want to do that? Answer: Copies. XtremIO has very good snaps. They are instantly created, have no performance overhead, take up minimal space, and are real volumes which are not dependent upon the underlying volume upon which they are based. Exadata has nothing like these. This customer needed to make a big test/dev farm (hundreds of copies) of their production database. This was easy on XtremIO, impossible on Exadata.

8 Krypton

Re: XtremIO and Exadata

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Good point for XtremIO selling!

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