Dell VNXe2 Configuring Asynchronous Replication

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  • Dell VNXe2 | Configuring Asynchronous Replication - Page 1
    EMC® VNXe® Series Version 3.1 Configuring Asynchronous Replication 302-002-437 REV 02
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    are the property of their respective owners. For the most up-to-date regulatory document for your product line, go to EMC Online Support (https://support.emc.com). EMC Corporation Hopkinton, Massachusetts 01748-9103 1-508-435-1000 In North America 1-866-464-7381 www.EMC.com 2 EMC VNXe Series
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    CONTENTS Chapter 1 Chapter 2 Chapter 3 Chapter 4 Overview 5 About this document 6 VNXe overview 6 What is data replication 6 Using replication for disaster recovery 7 Using replication for planned downtime 7 Fail back a replication session 8 Replication interfaces and connections 8
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    CONTENTS 4 EMC VNXe Series 3.1 Configuring Asynchronous Replication
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    CHAPTER 1 Overview This chapter addresses the following topics: l About this document 6 l VNXe overview...6 l What is data replication 6 l Using replication for disaster recovery 7 l Using replication for planned downtime 7 l Fail back a replication session 8 l Replication interfaces and
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    relevant concepts and the instructions to configure replication using Guide. VNXe overview EMC® VNXe® is a simple, yet powerful hybrid-storage system that delivers enterprise class reliability and data availability. It provides a solution that is easy to install, manage, service, and support
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    Replication limits Note the following limits related to replication: Attributes Number of replication sessions Concurrent data transfers Concurrent initial synchronizations Destination systems for remote replications Overview Limit 1000 (500 per SP) 256 (128 per SP) 32 (16 per SP) 16 Using
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    can set up a remote replication session to create and update a remote replica at a remote destination site. After synchronization (automatic or manual). Replication interfaces Replication with an IPv4 or IPv6 address. Note Replication is supported between like type IP addresses. For example, you
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    CHAPTER 2 Setting up replication This chapter addresses the following topics: l Create a replication interface 10 l Create a replication connection 10 l Create a replication session 11 Setting up replication 9
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    Setting up replication Create a replication interface Procedure 1. Click Settings > Replication Settings. 2. Select an available port, and click Create. 3. In the Create Replication Network Interface window, specify the following settings for each Storage Processor (SP): Table 1 Replication
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    the remote system who has privileges to create replication connections. Ensure that the user has a Storage Administrator role or higher. Enter the password associated with the user specified in the User Name field for the remote system. Select this option to enable an asynchronous connection between
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    Setting up replication 3. Click the Replication tab. 4. Decide if you want to create a local replication or a remote replication. l To create a local replication, click Configure Local Replication. When you create a local replication, the storage system creates a full copy of the storage resource
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    default synchronization of the replication session, click Show Advanced and choose from the following settings: l Manual Synchronization - Data will only be replicated when manually initiated (by selecting the replication session in System > System Replications > Session Details and clicking Sync
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    Setting up replication 6. Review, and, if necessary, update information on the relevant screens of the wizard. 7. Click Finish to complete the wizard. You can now go back to the browser page running Unisphere
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    CHAPTER 3 Managing replication This chapter addresses the following topics: l Manage replication interfaces 16 l Manage replication connections 16 l Manage replication sessions 17 Managing replication 15
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    that identifies the subnet where the replication interface resides. Gateway IP address associated with the replication interface. 5. Optionally, click Show Advanced to update the VLAN ID in the following manner: a. Click the pencil icon next to the VLAN ID field. b. Review the confirmation message
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    Select a replication connection from the list, and click Verify and Update Connection. The storage system verifies the communication path to the remote the user has a Storage Administrator role or higher. Remote password Enter the password associated with the remote user name to connect to the
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    to view a list of replication sessions. 2. (Optional) Select a replication session from the list, and click Details. 3. Click Sync Now to manually initiate the synchronization of the replication session. Pause or resume a replication session 1. Click System > System Replications to view a list of
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    are copied over back to the source storage resource at the next RPO interval. If an RPO schedule is not set, manually synchronize the replication session. Fail over a replication session 1. Click System > System Replications to view a list of replication sessions. 2. (Optional) Select a replication
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    Managing replication Delete a replication session 1. Click System > System Replications to view a list of replication sessions. 2. Select a replication session from the list 3. Click Delete. 20 EMC VNXe Series 3.1 Configuring Asynchronous Replication
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    CHAPTER 4 Unisphere CLI commands This chapter addresses the following topics: l Manage interfaces 22 l Manage remote storage systems 26 l Manage replication sessions 31 l Associated CLI commands 45 Unisphere CLI commands 21
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    Unisphere CLI commands Manage interfaces Create interfaces to enable and control access between the system, the network, and configured hosts. Specify the IP address for the interface as well as the IP addresses for the subnet mask and gateway. You can create the following types of interfaces: l
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    Unisphere CLI commands Table 9 Interface attributes (continued) Attribute Description Note This attribute applies to file interfaces only. Health state Health details A numerical value indicating the health of the system. Value is one of the following: l Unknown (0) l OK (5) l OK BUT (7) l
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    Unisphere CLI commands Qualifier Description -vlanId Note For systems with two SPs, a file interface is created on a pair of symmetric Ethernet ports rather than on a single specified port. Its current port is defined by NAS server SP and may differ from the specified port. For example, if the
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    View interfaces Unisphere CLI commands uemcli -d 10.0.0.1 -u Local/joe -p MyPassword456! /net/if create -type file -server nas_1 -port eth0_SPA -addr 2001:db8:4c: 8130:260:1600:3ed0:a3fe/64 Storage system address: 10.0.0.1 Storage system port: 443 HTTPS connection ID = IF_2 Operation completed
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    Unisphere CLI commands Preferred Port VLAN ID IP address Subnet mask Gateway SP 3: ID Type NAS server Preferred Port VLAN ID IP address Subnet mask Gateway SP = yes = eth1_spa = 1 = 192.168.1.2 = 255.255.255.0 = 192.168.1.254 = SPA = if_2 = replication = = no = eth1_spb = = 10.103.75.56
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    remote system is operating normally or the connection with the remote system is updating. l Critical failure (25) - Communication with the remote system has For systems that are the source in a replication session, the user password that is used to access the system. The list of source interface
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    that is used to access the system. -srcPassword For systems that are the source in a replication session, type the user password that is used to access the system. -srcPasswordSecure Specify the password in secure mode. Once you run the command with this qualifier, you will be asked to type the
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    Unisphere CLI commands Password456! -dstUsername admin2 -dstPassword Password986! connectionType sync Storage system address: 10.0.0.1 Storage system port: 443 HTTPS connection ID = RS_1 Operation completed successfully. View settings for remote storage systems View the configuration for a remote
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    the replication connection. This qualifier applies to VNX or Celerra systems only. -passPhraseSecure Specify the password in secure mode - the user will be prompted to input the password. -Sync Specify this qualifier to configure a synchronous connection between the source and destination systems
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    is duplicated either locally or to a remote network device. Replication produces a read-only, point-in-time copy of source storage data and periodically updates the copy, keeping it consistent with the source data. Storage replication provides an enhanced level of redundancy in case the main storage
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    At any given point in time, only one command is supported on a replication session. Before running a new command, ensure order to maintain the desired Recovery Point Objective (RPO). l manual - Data will only be replicated when manually initiated. Note As the RPO increases, the potential for data
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    unavailable. The destination storage resource is now in a read/write state. Review the state of the source and check your network connections for any problems. Once the source is back online, you can fail back the session to return it to normal operation. n Communication with the replication host
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    Unisphere CLI commands Table 11 Replication session attributes (continued) Attribute Source status Destination status Description either side could also interrupt communication. Status of the source storage resource in the session. Valid values are: l Unknown - Source status is unknown. l OK -
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    Unisphere CLI commands Table 11 Replication session attributes (continued) Attribute Local role Source resource Destination type Description has been lost. It is likely that the system is either powered down or there is a network connectivity issue between the systems. A change in the network
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    Unisphere CLI commands Table 11 Replication session attributes (continued) Attribute Description Destination system Destination resource Time of last sync Sync status Sync transfer size remaining Sync transfer rate Source SP A interface Source SP B interface Destination SP A interface
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    >] [-srcSPBInterface ] -dstType {local|remote - dstSys } -dstRes [-dstSPAInterface ] [dstSPBInterface ] [-name ] [-syncType {manual [- autoInitiate {yes|no}]|[auto -rpo ]] Action qualifiers Qualifier Description -srcRes Type the ID of the storage
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    . Valid values are: l auto - Data is replicated automatically in order to maintain the desired Recovery Point Objective (RPO). l manual - Data will only be replicated when manually initiated. -autoInitiate Note As the RPO increases, the potential for data loss also increases, as well as the amount
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    Unisphere CLI commands Qualifier -rpo Description Type the time interval for when the synchronization will run. Use the following format: [:MM] Where: l HH - Type the number of hours. Range is 00-24 hours (1 day). l MM - Type the number of minutes, in 5 minute increments. Range is 05 to 55.
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    set [-paused {yes|no [ -forceFullCopy ]}] [ -newName ] [ srcSPAInterface ] [ -dstSPAInterface ] [ srcSPBInterface ] [ -dstSPBInterface ] [ syncType { manual | auto -rpo }] Object qualifier Qualifier -id -name Description Type the ID of the replication
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    . Valid values are: l auto - Data is replicated automatically in order to maintain the desired Recovery Point Objective (RPO). l manual - Data will only be replicated when manually initiated. -rpo Note As the RPO increases, the potential for data loss also increases, as well as the amount of
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    Unisphere CLI commands Qualifier Description Where: l HH - Type the number of hours. Range is 00-24 hours (1 day). l MM - Type the number of minutes, in 5 minute increments. Range is 05 to 55. Example The following command changes the source interface and destination interface for replication
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    Unisphere CLI commands HTTPS connection Operation completed successfully. Fail over replication sessions Run this command on the destination system to perform a failover of a replication session, with possible data loss, in response to an emergency scenario in which the source becomes unavailable.
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    Unisphere CLI commands Example The following command performs a fail over of replication session 81604378625_FCNCH097274B3A_0000_81604378627_FCNCH097274B37_0000: uemcli -d 10.0.0.1 -u Local/joe -p MyPassword456! /prot/rep/session - id 81604378625_FCNCH097274B3A_0000_81604378627_FCNCH097274B37_0000
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    Unisphere CLI commands Example The following command performs a fail back of replication session 81604378625_FCNCH097274B3A_0000_81604378627_FCNCH097274B37_0000: uemcli -d 10.0.0.1 -u Local/joe -p MyPassword456! /prot/rep/session - id 81604378625_FCNCH097274B3A_0000_81604378627_FCNCH097274B37_0000
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    Unisphere CLI commands Name-value pair format 1: ID SP Ports Health state 2: ID SP Ports Health state = la0_SPA = SPA = eth0_SPA,eth1_SPA = OK (5) = la0_SPB = SPB = eth0_SPB,eth1_SPB = OK (5) Table format ID | SP | Ports | Health state la0_SPA | SPA | eth0_SPA,eth1_SPA | OK (5)
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    on which the port resides. Value is SPA or SPB. Types of protocols the port supports. Value is one of the following: l mgmt - Management interface. l file - Network interface cables. l Major failure (20) - Port has failed. Replace the SP that contains the port. Health details Additional health
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    Unisphere CLI commands Table 12 Network port attributes (continued) Attribute Description l MiniSAS_HD View Ethernet port settings View details about the network ports. You can filter on the port ID. Note The show action command on page 45 explains how to change the output format. Format /net/
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    Unisphere CLI commands Speed = 1 Gbps Health state = OK (5) Aggregated port ID = None Change Ethernet port settings Note The new settings are applied to a pair of symmetrical ports on dual SP systems. Change the maximum transmission unit size and port speed for an Ethernet port. Format /net/
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    Unisphere CLI commands l Increases overall throughput since two physical ports are linked into one logical port. l Provides basic load balancing across linked ports since the network traffic is distributed across multiple physical ports. l Provides redundant ports so that if one port in a linked
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    Unisphere CLI commands Table 13 Link aggregation attributes (continued) Attribute Description Health details l Critical failure (25) - Failed and recovery may not be possible. This condition has resulted in data loss and should be remedied immediately. l Non-recoverable error (30) - Completely
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    in bytes) for the linked ports. Default value is 1500. Note If you want to support jumbo frames, type 9000. Example The following command links port 0 and port 1 on SPA Note If your system has two SPs, the specified link aggregation is updated on both SPs. Format /net/la -id set [-ports
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    linked ports. Default is 1500 bytes per packet. Note If you want to support jumbo frames, type 9000. Example The following command changes the MTU size for link to 9000 bytes. The system has two SPs, so MTU size is updated for both link aggregation IDs: uemcli -d 10.0.0.1 -u Local/joe -p
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    Unisphere CLI commands ID = la0_SPB Operation completed successfully. 54 EMC VNXe Series 3.1 Configuring Asynchronous Replication
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EMC
®
VNXe
®
Series
Version 3.1
Configuring Asynchronous Replication
302-002-437 REV 02