Amazon
EFS
(Elastic File System)
o
Multiple EC2 instances
can access the file system at the same time
o
Can be accessed by
instances in different availability zones
§
Unlike EBS, which can
only be attached to one instance at a time and must be in the same availability
zone
o
But all instances must
be in the same VPC
·
Supports Network File System (NFS) version 4
o
Will work with
existing NFS-compliant applications and tools
·
Storage capacity is “elastic”
o
Automatically grows
and shrinks as files are added and removed
o
Only pay for the
storage used
§
No need to provision
storage in advance
o
Only limit: The
maximum size of a single file is 52 TB!
·
Read after Write
Consistency
EFS Performance
·
Amazon EFS is available in two performance
modes
o
General Purpose Performance Mode
o
Max I/O Performance Mode
·
Designed to support petabyte-scale
file systems
·
Can support thousands of concurrent
NFS connections
·
Every object is redundantly stored
across multiple availability zones
o
Provides high durability
Where to Use EFS
·
When a
common data source is needed for workloads and applications running on more
than one instance
o
Content management systems
o
Log files
o
Big Data
o
Common or shared drives
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