PowerMax and VMAX All Flash Solutions Design (Remote Replication Considerations) Flashcards
What is a required component of storage array to perform remote replication?
have dedicated FC or Ethernet ports
What is required for extended remote replication connectivity?
optical or IP network
DWDM or SONET are examples of optical networks
What is FCP?
Fibre Channel Protocol
designed to carry SCSI-3 data over an optical network
What is the throughput that can be provided by a FC connection?
100MBs - 1.6GBs
What is the distance that an FC connection can run?
500m - 10km
What is required to establish a FC connectivity for replication?
create zones on the switch and define initiator/target relationships
zones create IO path between host and storage
How has Ethernet technology evolved to reach 1GB/s for bandwidth?
combining IEEE 802.4 Ethernet with ANSI X3T11 Fibre Channel
What is CWDM?
course wavelength division multiplexing
optical bandwidth technology used for increasing bandwidth of fiber
How does CWDM work?
combines optical signals of different wavelengths on one strand of fiber
What is the range of data CWDM is able to transport?
transports up to 18 wavelengths w/ channel spacing of 20nm
sprectrum grid of 1270-1610nm
What is the typical range for 1550 nm window wavelengths?
1470nm-1610nm in 20nm increments
What is the typical range for 1310 nm window wavelengths?
1270-1410nm in 20nm increments
What is DWDM?
dense wavelength division multiplexing
involves the process of multiplexing different wavelength signals onto a single fiber
each fiber has a set of parrellel optical channels and each one uses slightly different wavelengths
What are the 4 major topologies for DWDM networks?
DWDM point to point with or without add-drop multiplexing networking
fully connected mesh network
star network
DWDM ring network w/ OADM nodes and a hub
What are SONET/SDH?
SONET = synchronous optical networking
SDH = synchronous digital hierarchy
standardized multiplexing protocols that transfer multiple bit streams over optical fiber using LEDs
What can you use to transfer data over SONET/SDH when using a lower data rate?
can be transferred over an electrical interface
What are the use cases for SONET/SDH?
to encapsulate earlier digital transmission standards like PDH
to directly support either ATM or POS networking
What is compression?
reduces the size of a dataset
What is deduplication?
identifies identical data sets and stores a single instance
What data reduction technologies are available on PowerMax but not VMAX?
Extended Data Compression (EDC)
Inline Dedupe
Data Reduction IO Module
DEFLATE Compression Algorithm
What data reduction technologies are available on VMAX but not PowerMax?
Compression IO Module
LZS Compression Algorithm
What data reduction technologies are available on both PowerMax and VMAX?
Adaptive Compression Engine (ACE)
FBA Storage Resource Pool
What is D@RE?
provides hardware based on array back-end encryption
protects information from unauthorized access when physical drives are removed from the system
How does D@RE work?
provides encryption on the BE using IO modules that incorporate 256-bit AES-XTS encryption
modules encrypt and decrypt data as it’s being written/read
How are drives encrypted w/ D@RE on PowerMax/VMAX?
all configured drives are encrypted including spares using unique DEK per drive
What key management technology does D@RE use?
RSA Embedded Data Protection Manager (eDPM)
set and forget key management