Welcome to the EMC Support Community Ask the Expert conversation. We will be covering EMC Cloud Object storage. Our SME’s will be available to answer questions on ATMOS, CTA, Centera and ECS. Among many areas, our SME’s will be on hand to answer your questions on the benefits and best practices of ECS CAS and Centera to ECS migrations.
Meet Your Experts:
Technical Support Engineer Level IV
During the past 11 years in the Object space, Dean has been involved in Remote Tech Support, TCE, and Testing. He is currently working in Centera to ECS Migration.
Technical Support Engineer III
Christian has been working in remote tech support in EMC Object space (CAS, CTA and CUA) for 8 years. Before that he was working as CE responsible for NAS storage. Christian has been employed at EMC for 15 years.
ECS/Atmos Tech Support
EMC Object Storage support Engineer since 2006.
Technical Support Engineer III
Ragy has been working within the Technology field for 6 years. Currently a Technical support engineer in the ETD Object Storage team. Currently, Cloud Tiering Appliance is his main focus. Ragy is passinate about innovation, and this has allowed him to become a winner of the EMC innovation conference 2015.
This discussion takes place from Jun 20th - July 1st. Get ready by bookmarking this page or signing up for e-mail notifications.
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This Ask the Expert session is now open for questions. For the next couple of weeks our Subject Matter Experts will be around to reply to your questions, comments or inquiries about our topic.
Let’s make this conversation useful, respectful and entertaining for all. Enjoy!
Robert, thanks for setting this up.
Can someone outline the Best Practices for Centera to ECS Migrations? Also, is there a formula for calculating how quickly the migration will complete?
There are a number of tools to migrate Centera to ECS but ECS Transformation has the most advantages.
With ECS Transformation, (built into ECS from V2.2) Centera data can be indexed within ECS before the data itself is actually migrated.
Transformation is initiated from ECS and once the data to be migrated is indexed, the application can cutover at that point.
The application would read and write directly to ECS. ECS can retrieve indexed data from Centera with minimal performance cost.
At any time the migration of the data itself can then be started in the background.
There are no official figures as to how long a migration would take as there are so many variables. We can certainly ask to see if the Engineering test figures can be made.
Excellent, thanks Dean. I'd be very interested to know a baseline ECS Transformation duration expectation for something like 100M (100,000,000) small clips, say 50KB each from an imaging application. Lets assume the Centera has 16 nodes and 4 access nodes which would seem pretty typical.
I will certainly contact Engineering and see if any test data can be made available.
This may just take a little time so please bear with me for a few days.
For Ecs transformation (so all reads and writes are just to ECS), the indexing side of things is quite quick and only needs to populate tables with queries to Centera.
For actually migrating the data I will revert as soon as I can
While Dean looks into your query there is a Centera to ECS migration White Paper which you may find useful available @ http://www.emc.com/collateral/white-papers/h15115-centera-to-ecs-migration.pdf
Timely thread for me!
Can someone explain the technical difference between Atmos and ECS or Point me to a detailed comparision? I have looked at a number of "technical" presentations and everything I see suggests that ECS is an update/rewrite of Atmos with a few changes such as containerization, xfs and a more modern stoage algorithm. Conceptually, I see no major difference and the HW is basically identical.
Though the hardware of ECS and Atmos can be similar and both have support multi protocol access (Note: ECS also has support for Hadoop and OpenStack Swift, refer to the ECS 2.2.1 Data Access Guide for details on ECS API support) , the underlying Architecture layers in each product work very differently. Comparing the documents below should help you here I think. Let me know if you need anything clarified.
Atmos 2.4 Administrators Guide -> https://support.emc.com/docu68366_Atmos-2.4-Administrator%E2%80%99s-Guide.pdf?language=en_US
Atm,os 2.4.1 Relesae Notes -> https://support.emc.com/docu70762_Atmos-2.4.1-Release-Notes.pdf?language=en_US
ECS 2.2.1 Planning Guide -> https://support.emc.com/docu70102_ECS_2.2.1_Planning_Guide.pdf?language=en_US
ECS 2.2.1 Data Access Guide -> https://support.emc.com/docu70101_ECS_2.2.1_Data_Access_Guide.pdf?language=en_US
ECS 2.2.1 Administrators Guide ->