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Displaying posts with tag: ops (reset)

Four short links: 26 October 2010
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  • 12 Months with MongoDB (Worknik) -- every type of retrieval got faster than their old MySQL store, and there are some other benefits too. They note that the admin tools aren't really there for MongoDB, so "there is a blurry hand-off between IT Ops and Engineering." (via Hacker News)
  • Dawn of a New Day -- Ray Ozzie's farewell note to Microsoft. Clear definition of the challenges to come: At first blush, this world of continuous services and connected devices doesn’t seem very different than today. But those who build, deploy and manage today’s websites understand viscerally that fielding a truly continuous service is incredibly difficult and is only achieved by
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    Database Architectures & Performance II
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    As described in the prior post, the shared-disk performance dilemma is simple:

    1. If each node stores/processes data in memory, versus disk, it is much faster.
    2. Each node must expose the most recent data to the other nodes, so those other nodes are not using old data.

    In other words, #1 above says flush data to disk VERY INFREQUENTLY for better performance, while #2 says flush everything to disk IMMEDIATELY for data consistency.

    Oracle recognized this dilemma when they built Oracle Parallel Server (OPS), the precursor to Oracle Real Application Cluster (RAC). In order to address the problem, Oracle developed Cache Fusion.

    Cache fusion is a peer-based shared cache. Each node works with a certain set of data in its local cache, until








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    Free Virtualization, and Sun's Q2 Results
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    Please read the luculent Safe Harbor Statement at the bottom of this page....

    We released our official earnings on Thursday last week, after pre-announcing the news one week prior alongside the announcement of our intent to acquire MySQL.

    Our second quarter financial announcement came down to this: we doubled our profitability compared to a year ago, with $260 million in net income on revenues of $3.6 billion, while generating $336 million in cash from operations. We also repurchased $750 million of our own shares within the quarter, and reaffirmed our guidance for

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