Free Practice Questions for EMC E20-598 Exam

Explanation/Reference:

The most important thing to do on a client with so many files is to make sure that the file cache is sizedappropriately. The file cache is responsible for the vast majority (>90%) of the performance of the Avamarclient. If there's a file cache miss, the client has to go and thrash your disk for a while chunking up a file thatmay already be on the server.

So how to tune the file cache size?

The file cache starts at 22MB in size and doubles in size each time it grows. Each file on a client will use 44bytes of space in the file cache (two SHA-1 hashes consuming 20 bytes each and 4 bytes of metadata). For 25million files, the client will generate just over 1GB of cache data.

http://jslabonte.blogspot.com/2013/08/avamar-and-large-dataset-with-multiples.html

Explanation/Reference:

Explanation/Reference:

I am sure answer is NOT A

As assessment I was selecting A which is not valid in the results

Avamar ensures protection from disk and data corruption through the use of RAID (redundant array ofindependent disks). The type of RAID depends on the particular node type.

The phases of hfscheck mentioned above run in the following sequence:

1- indexsweep

2- datasweep

3- paritysweep

4- refcheck

During the indexsweep phase, the system confirms the integrity of the index (the index is the "table of contents"for all the data on the system) and also caches the index entries for each data chunk onto the same disk wherethe chunk itself is stored. This is done to improve the performance of later phases of the hfscheck.The datasweep phase is typically the longest phase of hfscheck. This phase reads each data chunk from thesystem and compares the hash of that chunk with the hash that is recorded in the index. This confirms thateach data chunk is the same as it was when it was backed up.

As I'm sure you know, multi-node Avamar systems are protected by RAIN parity. During the paritysweepphase, the parity information is recalculated and checked against the parity information on disk.

The refcheck phase of hfscheck checks the referential integrity of the backups by verifying that every chunk ofdata that is referenced by a backup can be found in the index.

https://community.emc.com/thread/180789

Explanation/Reference:

Has been replaced by SolVe Desktop this March#

Explanation/Reference:

For initial backup of Avamar clients, it's best to start with a small number of clients to produce a dataset fromwhich commonality will be generated. This will increase the backup speed of following clients. On a newAvamar system, consider enabling overtime because all the data is new and there won't be much maintenanceto take place. Never enable overtime on an existing Avamar, rather configure the use of partial backups to besaved. Partial backups are saved for 7 days and are not deleted by the garbage collection process. When anunfinished job ends before completing and partial backups are enabled, the backup job will continue from thelast known state and will complete faster.

http://gregandthenetwork.blogspot.com/2013/12/avamar-configuration-design-best.html

https://communities.vmware.com/message/2166196

Explanation/Reference:

Explanation/Reference: