Data mirror invalid timestamped write handling
For handling data mirror invalid timestamped write activities, an apparatus is disclosed. The apparatus includes a data mirror that mirrors write activities from a first storage device at a first site to a second storage device at a second site. The apparatus includes a time monitor that retrieves a...
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creator | Miller, Dash D Perez, Miguel A Reed, David C |
description | For handling data mirror invalid timestamped write activities, an apparatus is disclosed. The apparatus includes a data mirror that mirrors write activities from a first storage device at a first site to a second storage device at a second site. The apparatus includes a time monitor that retrieves a timestamp for each of the mirrored write activities and monitors a reference clock in a storage control session as a comparison to validate the timestamp for each of the mirrored write activities. If the timestamp of a mirrored write activity is outside of a pre-determined parameter range, then the time monitor identifies the mirrored write activity as having a missing timestamp, assigns a next logical timestamp to the mirrored write activity, and prepares the mirrored write activity for inclusion in a consistency group associated with the next logical timestamp. |
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The apparatus includes a data mirror that mirrors write activities from a first storage device at a first site to a second storage device at a second site. The apparatus includes a time monitor that retrieves a timestamp for each of the mirrored write activities and monitors a reference clock in a storage control session as a comparison to validate the timestamp for each of the mirrored write activities. If the timestamp of a mirrored write activity is outside of a pre-determined parameter range, then the time monitor identifies the mirrored write activity as having a missing timestamp, assigns a next logical timestamp to the mirrored write activity, and prepares the mirrored write activity for inclusion in a consistency group associated with the next logical timestamp.</description><language>eng</language><subject>CALCULATING ; COMPUTING ; COUNTING ; ELECTRIC DIGITAL DATA PROCESSING ; PHYSICS</subject><creationdate>2018</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20181016&DB=EPODOC&CC=US&NR=10101941B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20181016&DB=EPODOC&CC=US&NR=10101941B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Miller, Dash D</creatorcontrib><creatorcontrib>Perez, Miguel A</creatorcontrib><creatorcontrib>Reed, David C</creatorcontrib><title>Data mirror invalid timestamped write handling</title><description>For handling data mirror invalid timestamped write activities, an apparatus is disclosed. The apparatus includes a data mirror that mirrors write activities from a first storage device at a first site to a second storage device at a second site. The apparatus includes a time monitor that retrieves a timestamp for each of the mirrored write activities and monitors a reference clock in a storage control session as a comparison to validate the timestamp for each of the mirrored write activities. If the timestamp of a mirrored write activity is outside of a pre-determined parameter range, then the time monitor identifies the mirrored write activity as having a missing timestamp, assigns a next logical timestamp to the mirrored write activity, and prepares the mirrored write activity for inclusion in a consistency group associated with the next logical timestamp.</description><subject>CALCULATING</subject><subject>COMPUTING</subject><subject>COUNTING</subject><subject>ELECTRIC DIGITAL DATA PROCESSING</subject><subject>PHYSICS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2018</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZNBzSSxJVMjNLCrKL1LIzCtLzMlMUSjJzE0tLknMLUhNUSgvyixJVchIzEvJycxL52FgTUvMKU7lhdLcDIpuriHOHrqpBfnxqcUFicmpeakl8aHBhgZAaGli6GRkTIwaABBLKtQ</recordid><startdate>20181016</startdate><enddate>20181016</enddate><creator>Miller, Dash D</creator><creator>Perez, Miguel A</creator><creator>Reed, David C</creator><scope>EVB</scope></search><sort><creationdate>20181016</creationdate><title>Data mirror invalid timestamped write handling</title><author>Miller, Dash D ; Perez, Miguel A ; Reed, David C</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US10101941B23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2018</creationdate><topic>CALCULATING</topic><topic>COMPUTING</topic><topic>COUNTING</topic><topic>ELECTRIC DIGITAL DATA PROCESSING</topic><topic>PHYSICS</topic><toplevel>online_resources</toplevel><creatorcontrib>Miller, Dash D</creatorcontrib><creatorcontrib>Perez, Miguel A</creatorcontrib><creatorcontrib>Reed, David C</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Miller, Dash D</au><au>Perez, Miguel A</au><au>Reed, David C</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Data mirror invalid timestamped write handling</title><date>2018-10-16</date><risdate>2018</risdate><abstract>For handling data mirror invalid timestamped write activities, an apparatus is disclosed. The apparatus includes a data mirror that mirrors write activities from a first storage device at a first site to a second storage device at a second site. The apparatus includes a time monitor that retrieves a timestamp for each of the mirrored write activities and monitors a reference clock in a storage control session as a comparison to validate the timestamp for each of the mirrored write activities. If the timestamp of a mirrored write activity is outside of a pre-determined parameter range, then the time monitor identifies the mirrored write activity as having a missing timestamp, assigns a next logical timestamp to the mirrored write activity, and prepares the mirrored write activity for inclusion in a consistency group associated with the next logical timestamp.</abstract><oa>free_for_read</oa></addata></record> |
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subjects | CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING PHYSICS |
title | Data mirror invalid timestamped write handling |
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