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  • 11g ???:Active Data Guard

    - by JaneZhang(???)
    ?Oracle 11g??,????(physical Standby)???redo???,???????,???mount??11g??,???redo???,????????read-only??,????Active Data Guard ???Active Data Guard,?????????????????,??????????????   Active Data Guard???????????,??,????????????,????????,????redo??,????????????,??????????? Oracle Active Data Guard ?Oracle Database Enterprise Edition?????,??????????????   ????Active Data Guard, ??????? read-only ????,???? ALTER DATABASE RECOVER MANAGED STANDBY DATABASE????????????:??????COMPATIBLE ????????11.0.0?  ???????Active Data Guard,???V$DATABASE????"READ ONLY WITH APPLY':      SQL> SELECT open_mode FROM V$DATABASE;      OPEN_MODE      --------------------      READ ONLY WITH APPLY   ????????????,???????real-time apply:   SQL>ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE; ?????????read-only????????:    • Issue SELECT statements, including queries that require multiple sorts that leverage TEMP segments    • Use ALTER SESSION and ALTER SYSTEM statements    • Use SET ROLE    • Call stored procedures    • Use database links (dblinks) to write to remote databases    • Use stored procedures to call remote procedures via dblinks    • Use SET TRANSACTION READ ONLY for transaction level read consistency    • Issue complex queries (such as grouping SET queries and WITH CLAUSE queries) ??????????read-only????????:    • Any DMLs (excluding simple SELECT statements) or DDLs    • Query accessing local sequences    • DMLs to local temporary tables    ?????Active Data Guard ??: • ????????????????? • ???Oracle Real Application Clusters (Oracle RAC) ,?????? • RAC???RAC??    Oracle Data Guard ?????,,????????:    * ?????????????????:     http://docs.oracle.com/cd/B28359_01/server.111/b28294/create_ps.htm   * ???Oracle Real Application Clusters (Oracle RAC) ,??????:     http://www.oracle.com/technetwork/database/features/availability/maa-wp-10g-racprimarysingleinstance-131970.pdf   * RAC ???RAC ??:     http://www.oracle.com/technetwork/database/features/availability/maa-wp-10g-racprimaryracphysicalsta-131940.pdf  ??Active Data Guard???????,?????:    http://www.oracle.com/technetwork/database/features/availability/maa-wp-11gr1-activedataguard-1-128199.pdf     ??Oracle Maximum Availability Architecture Best Practices?????,???:   http://www.oracle.com/goto/maa

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  • How to Promote a New Website

    Promoting a website is not a work of one day or one week, it takes time to improve a website's position on search engines. And if your website is a new one then it takes more time.

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  • Chiropractic SEO - How to Get More Patients Online

    Put the majority of your marketing efforts into the internet and make sure you get your website search engine optimized so that you can own valuable real estate on Google for the main keywords your target market is using to get hold of your exact services. Read now!!

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  • SEO Certification, Your Business, and Results

    The big question about SEO certification is does it do anything for your business? Small businesses and large businesses alike realize the importance of finding someone that is capable of either completing search engine optimization projects or offer SEO training to their staff.

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  • SEO Company Tips

    It is very important to get your website search engine optimized. No matter how hard you work on the website and how well you design it, chances are the website will remain largely unnoticed if you cannot ensure a good SEO for it.

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  • SEO is Only the First Step

    Search engine optimization is the hot topic of online business and website development. However, driving visitors to a website is only the first step. If a visitor arrives on a site that is written in incorrect English, all the SEO efforts will be wasted.

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  • Component Activities of SEO!

    Every website is designed for a purpose, that remains unsolved without a good visibility among the search results. SEO professionals sitting in SEO companies do such jobs which can improve the ranking and thus improve the visibility.

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  • Let's Play With SEO

    These days, search engine optimization has made its worth renowned due to its dynamic and self motivated nature all over the world. That is why you will need to play with SEO as a thoroughly professional web marketing technique.

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  • Guaranteed SEO

    Search engine optimization is a method by which the traffic and number of hits on a particular website is increased. Most experts say that it is important not only to get a quantitative increase in the traffic to the website, but a qualitative increase as well.

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  • SEO Starts With Keywords Designing

    Keywords are the most important and frequently used method of bringing more traffic to a website. To implement certain Search Engine Optimisation, in short SEO, keywords have an important role, though keywords are a small portion of overall SEO plan.

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  • What to Look For in an SEO Handbook

    An SEO handbook is a good investment for any website publisher. Organic search engine optimization will help your website get higher rankings and increased traffic. That should help increase your profits.

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  • Organic SEO Marketing Defined

    Without SEO you wouldn't be able to locate any of the millions of pages online. Search Engine Optimization (SEO) is the process that must be used to direct traffic to a website; it is really what fuels the Internet. SEO connects everyone who is looking for anything with the pages that they need to see.

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  • SEO - A Never Ending Process!

    Any business or institution has to have a website to reach out to its customers. This site should also have a good ranking among the search engine results so that it enjoys visits. For this, the site has to be optimized by a good SEO expert. And it has to go on continually for ever and ever.

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