What recommendations would you make for implementing a production iSCSI environment?
What recommendations would you make for implementing a production iSCSI environment?
iSCSI should be considered a local-area technology, not a wide-area technology, because of latency issues and security concerns. You should also segregate iSCSI traffic from general traffic. Layer-2 VLANs are a particularly good way to implement this segregation. Beware of oversubscription.
What protocol is iSCSI technology used to work on?
SCSI storage protocol
iSCSI is a block protocol for storage networking and runs the very common SCSI storage protocol across a network connection which is usually Ethernet. iSCSI, like Fibre Channel, can be used to create a Storage Area Network (SAN). iSCSI traffic can be run over a shared network or a dedicated storage network.
What are the two different types of storage area network system?
A SAN and network-attached storage (NAS) are two different types of shared networked storage solutions.
What are iSCSI devices?
In computing, iSCSI (/ˈaɪskʌzi/ ( listen) EYE-skuz-ee) is an acronym for Internet Small Computer Systems Interface, an Internet Protocol (IP)-based storage networking standard for linking data storage facilities. It provides block-level access to storage devices by carrying SCSI commands over a TCP/IP network.
What is iSCSI port binding?
Port binding is used in iSCSI when multiple VMkernel ports for iSCSI reside in the same broadcast domain and IP subnet to allow multiple paths to an iSCSI array that broadcasts a single IP address. All VMkernel ports used for iSCSI connectivity must reside in the same broadcast domain and IP subnet. …
How many iSCSI LUN per host?
Host operating system limits for SAN configurations
| Parameter | Windows | Linux |
|---|---|---|
| LUNs per host | 255 | 2,048 devices max (where each path to a LUN is a device) |
| Maximum paths from host to LUN | 8 | 24 (max of 2,048 per host) |
| Maximum paths from host to storage solution | 1,024 | 1,024 |
| Max LUN size | 2 TB (MBR) 16 TB (GPT) | 16 TB |
What layer is iSCSI?
transport layer protocol
iSCSI is a transport layer protocol that works on top of the Transport Control Protocol (TCP). It enables block-level SCSI data transport between the iSCSI initiator and the storage target over TCP/IP networks.
What is difference between SCSI and iSCSI?
# Wide Ultra2 SCSI: Uses a 16-bit bus and supports data rates of 80 MBps. iSCSI is Internet SCSI (Small Computer System Interface), an Internet Protocol (IP)-based storage networking standard for linking data storage facilities, developed by the Internet Engineering Task Force (IETF).
How do I enable iSCSI port binding?
On the Configuration tab of the host in your vSphere client, click Storage Adapters. Select your iSCSI Software Adapter vmhba. Right-click on the iSCSI Software Adapter vmhba and click Properties. On the Network Configuration tab, click Add for the vmkernel port you want to bind and click OK.
What do you mean by high availability in virtualization?
Newcomers to the world of virtualization often confuse high availability with fault tolerance. High availability allows virtual machines to be moved from one physical host to another without appreciable downtime for the virtual machine. This zero-downtime transition does require that all involved hardware be in working condition.
Which is the most deployed high availability cluster?
In production, HA (High-Availability) and LB (Load Balancing) Clusters are the most deployed cluster types in the clustered environment. They offer, uninterrupted availability of services/data as they can be (for eg: web services) to the end-user community.
What do you need for high availability in Hyper-V?
Some services and applications (like Microsoft Exchange) can be protected using multiple Hyper-V virtual machines and clustering schemes. In order to achieve high availability in Hyper-V, you’ll need a minimum of two physical hosts and some form of “shared storage”.
Who is responsible for high availability cluster in RedHat?
The High-Availability Cluster in RedHat / Centos 7 is completely different from the previous versions. In RedHat version 7 onwards “pacemaker” becomes the default Cluster Resource-Manager (RM) and Corosync is responsible for exchanging and updating cluster information with other cluster nodes regularly.