Dell PowerProtect DD Management Center (DDMC) 7.9 Installation and Administration Guide

Monitoring replication

The Replication pages provide status and performance details about replication pairs – organized by systems, Groups, or Tenants. For each page, you can view either pairs, cascades, or topology by selecting the controls at the upper right.

For Tenants – in the Replication > Overview > All Pairs page:

• Grouping hierarchy is Tenant, Tenant Unit, Inbound, Outbound, Automatic, On-demand, Replication pair. If there are no applicable replication pairs, the corresponding row will not appear.
• If a Tenant Unit has no MTrees or Storage Units participating as a Source or Destination, that Tenant Unit is not displayed.
• MTrees and Storage Units that are not assigned to any Tenant Units are not displayed, even if they may be a source or destination. Similarly, if all Tenant Units in a Tenant have no MTrees or Storage Units with Replication contexts, that Tenant is not displayed.
• RBAC (role-based access control) also affects the Tenants and Tenant Units that are displayed.
• The CSV (comma-separated values) file contains these addition columns: Tenant, Tenant Unit, Source Tenant, Source Tenant Unit, Destination Tenant, Destination Tenant Unit. It does not contain the System column.
• Replication pairs are grouped by the Tenant or Tenant Unit to which the source or destination MTrees or Storage Units belong.
• A pair will be listed twice when the source and destination belong to different Tenant Units.

For Tenants – in the Replication > Overview > Topology page:

• The source or destination shows the Tenant Unit name if the MTree or Storage Unit belongs to a Tenant Unit.
• Tenant Units are shown inside systems. The Tenant name is shown above the Tenant Unit icon.
• Tenant Units can be expanded just like systems.
• MTrees that do not belong to a Tenant Unit are displayed if one end of the pair belongs to a Tenant Unit.
• Tenant Units not assigned to a Tenant are displayed if one of their MTrees or Storage Units has a replication to or from an MTree or Storage Unit belonging to a Tenant Unit.
• Cascaded replications are still displayed if they include data that originates from or is replicated to a managed Tenant Unit.
• The context menu for a Tenant Unit includes menu items for Tenant and Tenant Unit detail lightboxes.
• You can choose the related pairs view for a Tenant Unit or Tenant.
• The related pairs view for a Tenant shows all Tenant Units from that Tenant, and incoming, outgoing, or cascaded pairs from its Tenant Units.

For Tenants and Systems – in the Replication > Overview > All Pairs page:

• Each monitored DD system or Tenant that has configured replication pairs is listed.
• Expand an entry to see its inbound and outbound replications, and for these, expand to see the replication type: Automatic (Data Domain or PowerProtect system to Data Domain or PowerProtect system replications) and On-demand (client-initiated and controlled replication of DD Boost files), and expand those to see the pairs of that type. The Inbound and Outbound entries are shown only when applicable.
• Use the column selector to display columns for replication status, number of pairs (totals for systems, inbound, and outbound replications), and a selectable/configurable time-interval for displaying historical replication data.
• Double-click a status error icon at the system level to open the System Details Lightbox, where hovering on the Replication LED exposes a pop-up with a link to the Alerts page, which is filtered for the pairs in error. The Status error icon for a category (inbound, outbound, system) shows if any of its items has an error condition.
• Use the right triangle System control at the upper left of the table to expand the inbound and outbound tiers to see all Automatic and On-Demand replications (if the system entries have not been expanded yet), and also to collapse all expanded entries.

For Systems, Groups, or Tenants – in the Replication > Automatic page:

• All monitored system replications for directory, collection, and MTree replication are listed.
• The page banner displays the total count of monitored Automatic replications, and the table shows for each replication pair selectable columns for the status, source and destination systems, and performance data, such as lag time (the lag cell is red when lag duration is greater than or equal to the Critical threshold and yellow for Warnings; hover over the cell for detailed information about the lag threshold), lag trend (increasing – the data cannot be replicated within the lag threshold), steady, decreasing, or no arrow if the pair is suspended or in error), time over threshold (hover to see policy settings), bytes remaining, and status message text.
• The page-specific controls include Assign Properties and Lag Threshold Policy/Manage Lag Threshold Policies to set/manage alerting for when an Automatic Replication lag time exceeds the set time limit for critical and warning levels.

For Systems, Groups, or Tenants – in the Replication > On-Demand page:

• Historical data for completed replications can be viewed for the past 24 hours, 7 days, 30 days, 90 days, or by setting a custom time frame.
• Details that are shown are for Pre-comp data that is replicated, completed and failed replicated files, percentage of failure, and the last error messages.
• For the group view, data for pairs are rolled up at each group level. Data for all pairs are summarized at the last line of the table.
• The number of completed and failed files can include file replications that the system retried up to four times due to recoverable failures. The sum of the completed and failed file replications can be greater than the total number of file replications that were initiated by the DD Boost applications on the replication pair.
• DD Boost file replications are listed (for systems running DDOS 5.3.1 or later), showing for the pair: the last transfer status, source and destination storage units, and performance data for recent and completed replications. The table can organized by Pairs or Groups (switch at upper right).
• If the source or destination fields show an IP address instead of a hostname, the DNS server configuration for the DD system must be modified. When configuring DD systems to monitor DD Boost (on-demand replication), ensure that their DNS servers include configuration for both forward and reverse hostname lookup. Without proper DNS server configuration, DD systems cannot translate from IP addresses to host names, and the source and destination paths contain IP addresses instead of host names.
• The replication Pair Details control is active when a pair is selected and shows a lot of replication detail.
• The System Details control is active when a system entry is selected on the Overview page.
• The Export CSV file control sends the overview listing with performance data for the last 7 days to a file with comma-separated values (for viewing in Excel, for example).