Re: Regarding migrating data from Oracle to Cassandra.migrate data from Oracle to Cassandra.
Hi All, Is there any free Cassandra IDEs available? If so please share? what is advantages of enterprise edition IDEs? Regards, Shyam On Wed, Sep 5, 2018 at 6:51 PM sha p wrote: > > Hi all , >> Me new to Cassandra , i was asked to migrate data from Oracle to >> Cassandra. >> Please help me giving your valuable guidance. >> 1) Can it be done using open source Cassandra. >> 2) Where should I start data model from? >> 3) I should use java, what kind of jar/libs/tools I need use ? >> 4) How I decide the size of cluster , please provide some sample >> guidelines. >> 5) this should be in production , so what kind of things i should take >> care for better support or debugging tomorrow? >> 6) Please provide some good books /links which can help me in this task. >> >> >> Thanks in advance. >> Highly appreciated your every amal help. >> >> Regards, >> Shyam >> >
Re: Regarding migrating data from Oracle to Cassandra.migrate data from Oracle to Cassandra.
Thanks a lot Rahul sir, Where can I find more information ? any blog or links on that ? On Mon, Sep 10, 2018 at 6:52 PM Rahul Singh wrote: > Look into Kafka Connect. It does tracking internally in a topic. Works > better going from relational to Cassandra. > > Still won’t fix your potential data model issue related to skew and wide > partitions. > > Rahul Singh > Chief Executive Officer > m 202.905.2818 > > Anant Corporation > 1010 Wisconsin Ave NW, Suite 250 > Washington, D.C. 20007 > > We build and manage digital business technology platforms. > On Sep 6, 2018, 9:20 AM -0400, sha p , wrote: > > Thank you Jeff. > While migration , how can test/validate against Cassandra particularly i > am going for "parallel run". Any sample strategy? > > > Regards, > Shyam > > On Thu, 6 Sep 2018, 09:48 Jeff Jirsa, wrote: > >> It very much depends on your application. You'll PROBABLY want to double >> write for some period of time - start writes to both Cassandra and Oracle, >> and then ensure they're both in sync. Once you're sure they're both in >> sync, move your reads from Oracle to Cassandra. >> >> >> >> On Wed, Sep 5, 2018 at 8:58 PM sha p wrote: >> >>> Hi all, >>> Sir how should I keep track of the data which is moved to Cassandra , >>> what are the best strategies available? >>> >>> Regards, >>> Shyam >>> >>> On Wed, 5 Sep 2018, 18:51 sha p, wrote: >>> Hi all , > Me new to Cassandra , i was asked to migrate data from Oracle to > Cassandra. > Please help me giving your valuable guidance. > 1) Can it be done using open source Cassandra. > 2) Where should I start data model from? > 3) I should use java, what kind of jar/libs/tools I need use ? > 4) How I decide the size of cluster , please provide some sample > guidelines. > 5) this should be in production , so what kind of things i should take > care for better support or debugging tomorrow? > 6) Please provide some good books /links which can help me in this > task. > > > Thanks in advance. > Highly appreciated your every amal help. > > Regards, > Shyam >
Re: Regarding migrating data from Oracle to Cassandra.migrate data from Oracle to Cassandra.
Look into Kafka Connect. It does tracking internally in a topic. Works better going from relational to Cassandra. Still won’t fix your potential data model issue related to skew and wide partitions. Rahul Singh Chief Executive Officer m 202.905.2818 Anant Corporation 1010 Wisconsin Ave NW, Suite 250 Washington, D.C. 20007 We build and manage digital business technology platforms. On Sep 6, 2018, 9:20 AM -0400, sha p , wrote: > Thank you Jeff. > While migration , how can test/validate against Cassandra particularly i am > going for "parallel run". Any sample strategy? > > > Regards, > Shyam > > > On Thu, 6 Sep 2018, 09:48 Jeff Jirsa, wrote: > > > It very much depends on your application. You'll PROBABLY want to double > > > write for some period of time - start writes to both Cassandra and > > > Oracle, and then ensure they're both in sync. Once you're sure they're > > > both in sync, move your reads from Oracle to Cassandra. > > > > > > > > > > > > > On Wed, Sep 5, 2018 at 8:58 PM sha p wrote: > > > > > Hi all, > > > > > Sir how should I keep track of the data which is moved to Cassandra , > > > > > what are the best strategies available? > > > > > > > > > > Regards, > > > > > Shyam > > > > > > > > > > > On Wed, 5 Sep 2018, 18:51 sha p, wrote: > > > > > > > > > > > > > > > > > Hi all , > > > > > > > > > Me new to Cassandra , i was asked to migrate data from Oracle > > > > > > > > > to Cassandra. > > > > > > > > > Please help me giving your valuable guidance. > > > > > > > > > 1) Can it be done using open source Cassandra. > > > > > > > > > 2) Where should I start data model from? > > > > > > > > > 3) I should use java, what kind of jar/libs/tools I need use > > > > > > > > > ? > > > > > > > > > 4) How I decide the size of cluster , please provide some > > > > > > > > > sample guidelines. > > > > > > > > > 5) this should be in production , so what kind of things i > > > > > > > > > should take care for better support or debugging tomorrow? > > > > > > > > > 6) Please provide some good books /links which can help me in > > > > > > > > > this task. > > > > > > > > > > > > > > > > > > > > > > > > > > > Thanks in advance. > > > > > > > > > Highly appreciated your every amal help. > > > > > > > > > > > > > > > > > > Regards, > > > > > > > > > Shyam
Re: Regarding migrating data from Oracle to Cassandra.migrate data from Oracle to Cassandra.
Thank you Jeff. While migration , how can test/validate against Cassandra particularly i am going for "parallel run". Any sample strategy? Regards, Shyam On Thu, 6 Sep 2018, 09:48 Jeff Jirsa, wrote: > It very much depends on your application. You'll PROBABLY want to double > write for some period of time - start writes to both Cassandra and Oracle, > and then ensure they're both in sync. Once you're sure they're both in > sync, move your reads from Oracle to Cassandra. > > > > On Wed, Sep 5, 2018 at 8:58 PM sha p wrote: > >> Hi all, >> Sir how should I keep track of the data which is moved to Cassandra , >> what are the best strategies available? >> >> Regards, >> Shyam >> >> On Wed, 5 Sep 2018, 18:51 sha p, wrote: >> >>> >>> Hi all , Me new to Cassandra , i was asked to migrate data from Oracle to Cassandra. Please help me giving your valuable guidance. 1) Can it be done using open source Cassandra. 2) Where should I start data model from? 3) I should use java, what kind of jar/libs/tools I need use ? 4) How I decide the size of cluster , please provide some sample guidelines. 5) this should be in production , so what kind of things i should take care for better support or debugging tomorrow? 6) Please provide some good books /links which can help me in this task. Thanks in advance. Highly appreciated your every amal help. Regards, Shyam >>>
Re: Regarding migrating data from Oracle to Cassandra.migrate data from Oracle to Cassandra.
It very much depends on your application. You'll PROBABLY want to double write for some period of time - start writes to both Cassandra and Oracle, and then ensure they're both in sync. Once you're sure they're both in sync, move your reads from Oracle to Cassandra. On Wed, Sep 5, 2018 at 8:58 PM sha p wrote: > Hi all, > Sir how should I keep track of the data which is moved to Cassandra , what > are the best strategies available? > > Regards, > Shyam > > On Wed, 5 Sep 2018, 18:51 sha p, wrote: > >> >> Hi all , >>> Me new to Cassandra , i was asked to migrate data from Oracle to >>> Cassandra. >>> Please help me giving your valuable guidance. >>> 1) Can it be done using open source Cassandra. >>> 2) Where should I start data model from? >>> 3) I should use java, what kind of jar/libs/tools I need use ? >>> 4) How I decide the size of cluster , please provide some sample >>> guidelines. >>> 5) this should be in production , so what kind of things i should take >>> care for better support or debugging tomorrow? >>> 6) Please provide some good books /links which can help me in this task. >>> >>> >>> Thanks in advance. >>> Highly appreciated your every amal help. >>> >>> Regards, >>> Shyam >>> >>
Re: Regarding migrating data from Oracle to Cassandra.migrate data from Oracle to Cassandra.
Hi all, Sir how should I keep track of the data which is moved to Cassandra , what are the best strategies available? Regards, Shyam On Wed, 5 Sep 2018, 18:51 sha p, wrote: > > Hi all , >> Me new to Cassandra , i was asked to migrate data from Oracle to >> Cassandra. >> Please help me giving your valuable guidance. >> 1) Can it be done using open source Cassandra. >> 2) Where should I start data model from? >> 3) I should use java, what kind of jar/libs/tools I need use ? >> 4) How I decide the size of cluster , please provide some sample >> guidelines. >> 5) this should be in production , so what kind of things i should take >> care for better support or debugging tomorrow? >> 6) Please provide some good books /links which can help me in this task. >> >> >> Thanks in advance. >> Highly appreciated your every amal help. >> >> Regards, >> Shyam >> >
Re: [EXTERNAL] Regarding migrating data from Oracle to Cassandra.migrate data from Oracle to Cassandra.
Thank you all very much. Migration is due to Oracle not scaling as expected. Sure I will be posting my queries and doubts time to time for your guidance. Thank you. Shyam On Wed, 5 Sep 2018, 21:28 Rahul Singh, wrote: > Look here for some “migration” or data modeling articles. > > *https://anant.github.io/awesome-cassandra/* > <https://anant.github.io/awesome-cassandra/> > > Rahul Singh > Chief Executive Officer > m 202.905.2818 > > Anant Corporation > 1010 Wisconsin Ave NW, Suite 250 > Washington, D.C. 20007 > > We build and manage digital business technology platforms. > On Sep 5, 2018, 10:47 AM -0500, Jeff Jirsa , wrote: > > All of Sean's points are good, a few more: > - Apache Cassandra (free, open source, official) is usually sufficient. > DSE may be faster, but really it's about whether or not you're willing to > pay for support. If you're trying to stop paying Oracle, I suspect you'd > probably not want to start paying someone else - try the free version > first, and you can look for proprietary options after that. > - http://shop.oreilly.com/product/0636920043041.do is relatively recent > and mostly pretty good > - Ask a lot of questions, use this list, but try things out first so > people have a way to point you in the right direction. > > > > On Wed, Sep 5, 2018 at 7:58 AM Durity, Sean R > wrote: > >> 3 starting points: >> >> - DO NOT migrate your tables as they are in Oracle to >> Cassandra. In most cases, you need a different model for Cassandra >> >> - DO take the (free) DataStax Academy courses to learn much >> more about Cassandra as you dive in. It is a systematic and bite-size >> approach to learning all things Cassandra (and eventually, DataStax >> Enterprise, should you go that way). However, open source Cassandra is fine >> as a data platform. DSE gives you more options for data models, better >> administration and monitoring tools, support, etc. It all depends on what >> you need/want to build/can afford >> >> - Cluster sizing depends on your goals for the data platform. >> Do you need lots of storage, lots of throughput, high availability, low >> latency, workload separation, etc.? A couple guidelines – use at least 3 >> nodes per data center (DC) and at least 2 DCs for availability. Use SSDs >> for storage and keep node size 3 TB or less for reasonable administration. >> If six nodes are too many – you probably don’t need Cassandra. If you can >> define what you need your data platform to deliver, then you can start a >> sizing discussion. The good thing is, you can always scale (as long as the >> data model is good). >> >> >> >> >> >> Sean Durity >> >> >> >> *From:* sha p >> *Sent:* Wednesday, September 05, 2018 9:21 AM >> *To:* user@cassandra.apache.org >> *Subject:* [EXTERNAL] Regarding migrating data from Oracle to >> Cassandra.migrate data from Oracle to Cassandra. >> >> >> >> >> >> Hi all , >> >> Me new to Cassandra , i was asked to migrate data from Oracle to >> Cassandra. >> >> Please help me giving your valuable guidance. >> >> 1) Can it be done using open source Cassandra. >> >> 2) Where should I start data model from? >> >> 3) I should use java, what kind of jar/libs/tools I need use ? >> >> 4) How I decide the size of cluster , please provide some sample >> guidelines. >> >> 5) this should be in production , so what kind of things i should take >> care for better support or debugging tomorrow? >> >> 6) Please provide some good books /links which can help me in this task. >> >> >> >> >> >> Thanks in advance. >> >> Highly appreciated your every amal help. >> >> >> >> Regards, >> >> Shyam >> >> >> -- >> >> The information in this Internet Email is confidential and may be legally >> privileged. It is intended solely for the addressee. Access to this Email >> by anyone else is unauthorized. If you are not the intended recipient, any >> disclosure, copying, distribution or any action taken or omitted to be >> taken in reliance on it, is prohibited and may be unlawful. When addressed >> to our clients any opinions or advice contained in this Email are subject >> to the terms and conditions expressed in any applicable governing The Home >> Depot terms of business or client engagement letter. The Home Depot >> disclaims all responsibility and liability for the accuracy and content of >> this attachment and for any damages or losses arising from any >> inaccuracies, errors, viruses, e.g., worms, trojan horses, etc., or other >> items of a destructive nature, which may be contained in this attachment >> and shall not be liable for direct, indirect, consequential or special >> damages in connection with this e-mail message or its attachment. >> >
Re: [EXTERNAL] Regarding migrating data from Oracle to Cassandra.migrate data from Oracle to Cassandra.
Look here for some “migration” or data modeling articles. https://anant.github.io/awesome-cassandra/ Rahul Singh Chief Executive Officer m 202.905.2818 Anant Corporation 1010 Wisconsin Ave NW, Suite 250 Washington, D.C. 20007 We build and manage digital business technology platforms. On Sep 5, 2018, 10:47 AM -0500, Jeff Jirsa , wrote: > All of Sean's points are good, a few more: > - Apache Cassandra (free, open source, official) is usually sufficient. DSE > may be faster, but really it's about whether or not you're willing to pay for > support. If you're trying to stop paying Oracle, I suspect you'd probably not > want to start paying someone else - try the free version first, and you can > look for proprietary options after that. > - http://shop.oreilly.com/product/0636920043041.do is relatively recent and > mostly pretty good > - Ask a lot of questions, use this list, but try things out first so people > have a way to point you in the right direction. > > > > > On Wed, Sep 5, 2018 at 7:58 AM Durity, Sean R > > wrote: > > > 3 starting points: > > > - DO NOT migrate your tables as they are in Oracle to Cassandra. > > > In most cases, you need a different model for Cassandra > > > - DO take the (free) DataStax Academy courses to learn much more > > > about Cassandra as you dive in. It is a systematic and bite-size approach > > > to learning all things Cassandra (and eventually, DataStax Enterprise, > > > should you go that way). However, open source Cassandra is fine as a data > > > platform. DSE gives you more options for data models, better > > > administration and monitoring tools, support, etc. It all depends on what > > > you need/want to build/can afford > > > - Cluster sizing depends on your goals for the data platform. Do > > > you need lots of storage, lots of throughput, high availability, low > > > latency, workload separation, etc.? A couple guidelines – use at least 3 > > > nodes per data center (DC) and at least 2 DCs for availability. Use SSDs > > > for storage and keep node size 3 TB or less for reasonable > > > administration. If six nodes are too many – you probably don’t need > > > Cassandra. If you can define what you need your data platform to deliver, > > > then you can start a sizing discussion. The good thing is, you can always > > > scale (as long as the data model is good). > > > > > > > > > Sean Durity > > > > > > From: sha p > > > Sent: Wednesday, September 05, 2018 9:21 AM > > > To: user@cassandra.apache.org > > > Subject: [EXTERNAL] Regarding migrating data from Oracle to > > > Cassandra.migrate data from Oracle to Cassandra. > > > > > > > > > > quote_type > > > > Hi all , > > > > Me new to Cassandra , i was asked to migrate data from Oracle to > > > > Cassandra. > > > > Please help me giving your valuable guidance. > > > > 1) Can it be done using open source Cassandra. > > > > 2) Where should I start data model from? > > > > 3) I should use java, what kind of jar/libs/tools I need use ? > > > > 4) How I decide the size of cluster , please provide some sample > > > > guidelines. > > > > 5) this should be in production , so what kind of things i should take > > > > care for better support or debugging tomorrow? > > > > 6) Please provide some good books /links which can help me in this task. > > > > > > > > > > > > Thanks in advance. > > > > Highly appreciated your every amal help. > > > > > > > > Regards, > > > > Shyam > > > > > > > > > The information in this Internet Email is confidential and may be legally > > > privileged. It is intended solely for the addressee. Access to this Email > > > by anyone else is unauthorized. If you are not the intended recipient, > > > any disclosure, copying, distribution or any action taken or omitted to > > > be taken in reliance on it, is prohibited and may be unlawful. When > > > addressed to our clients any opinions or advice contained in this Email > > > are subject to the terms and conditions expressed in any applicable > > > governing The Home Depot terms of business or client engagement letter. > > > The Home Depot disclaims all responsibility and liability for the > > > accuracy and content of this attachment and for any damages or losses > > > arising from any inaccuracies, errors, viruses, e.g., worms, trojan > > > horses, etc., or other items of a destructive nature, which may be > > > contained in this attachment and shall not be liable for direct, > > > indirect, consequential or special damages in connection with this e-mail > > > message or its attachment.
Re: [EXTERNAL] Regarding migrating data from Oracle to Cassandra.migrate data from Oracle to Cassandra.
The biggest issue you’ll have is that “migration” from a relational to Cassandra is not a 1 to 1. The schemas will have to change. DSE has other technology that is a little more useful - such as Spark / Spark SQL / Solr that is built in which helps meet the needs which Oracle was previously providing. Rahul Singh Chief Executive Officer m 202.905.2818 Anant Corporation 1010 Wisconsin Ave NW, Suite 250 Washington, D.C. 20007 We build and manage digital business technology platforms. On Sep 5, 2018, 10:47 AM -0500, Jeff Jirsa , wrote: > All of Sean's points are good, a few more: > - Apache Cassandra (free, open source, official) is usually sufficient. DSE > may be faster, but really it's about whether or not you're willing to pay for > support. If you're trying to stop paying Oracle, I suspect you'd probably not > want to start paying someone else - try the free version first, and you can > look for proprietary options after that. > - http://shop.oreilly.com/product/0636920043041.do is relatively recent and > mostly pretty good > - Ask a lot of questions, use this list, but try things out first so people > have a way to point you in the right direction. > > > > > On Wed, Sep 5, 2018 at 7:58 AM Durity, Sean R > > wrote: > > > 3 starting points: > > > - DO NOT migrate your tables as they are in Oracle to Cassandra. > > > In most cases, you need a different model for Cassandra > > > - DO take the (free) DataStax Academy courses to learn much more > > > about Cassandra as you dive in. It is a systematic and bite-size approach > > > to learning all things Cassandra (and eventually, DataStax Enterprise, > > > should you go that way). However, open source Cassandra is fine as a data > > > platform. DSE gives you more options for data models, better > > > administration and monitoring tools, support, etc. It all depends on what > > > you need/want to build/can afford > > > - Cluster sizing depends on your goals for the data platform. Do > > > you need lots of storage, lots of throughput, high availability, low > > > latency, workload separation, etc.? A couple guidelines – use at least 3 > > > nodes per data center (DC) and at least 2 DCs for availability. Use SSDs > > > for storage and keep node size 3 TB or less for reasonable > > > administration. If six nodes are too many – you probably don’t need > > > Cassandra. If you can define what you need your data platform to deliver, > > > then you can start a sizing discussion. The good thing is, you can always > > > scale (as long as the data model is good). > > > > > > > > > Sean Durity > > > > > > From: sha p > > > Sent: Wednesday, September 05, 2018 9:21 AM > > > To: user@cassandra.apache.org > > > Subject: [EXTERNAL] Regarding migrating data from Oracle to > > > Cassandra.migrate data from Oracle to Cassandra. > > > > > > > > > > quote_type > > > > Hi all , > > > > Me new to Cassandra , i was asked to migrate data from Oracle to > > > > Cassandra. > > > > Please help me giving your valuable guidance. > > > > 1) Can it be done using open source Cassandra. > > > > 2) Where should I start data model from? > > > > 3) I should use java, what kind of jar/libs/tools I need use ? > > > > 4) How I decide the size of cluster , please provide some sample > > > > guidelines. > > > > 5) this should be in production , so what kind of things i should take > > > > care for better support or debugging tomorrow? > > > > 6) Please provide some good books /links which can help me in this task. > > > > > > > > > > > > Thanks in advance. > > > > Highly appreciated your every amal help. > > > > > > > > Regards, > > > > Shyam > > > > > > > > > The information in this Internet Email is confidential and may be legally > > > privileged. It is intended solely for the addressee. Access to this Email > > > by anyone else is unauthorized. If you are not the intended recipient, > > > any disclosure, copying, distribution or any action taken or omitted to > > > be taken in reliance on it, is prohibited and may be unlawful. When > > > addressed to our clients any opinions or advice contained in this Email > > > are subject to the terms and conditions expressed in any applicable > > > governing The Home Depot terms of business or client engagement letter. > > > The Home Depot disclaims all responsibility and liability for the > > > accuracy and content of this attachment and for any damages or losses > > > arising from any inaccuracies, errors, viruses, e.g., worms, trojan > > > horses, etc., or other items of a destructive nature, which may be > > > contained in this attachment and shall not be liable for direct, > > > indirect, consequential or special damages in connection with this e-mail > > > message or its attachment.
Re: [EXTERNAL] Regarding migrating data from Oracle to Cassandra.migrate data from Oracle to Cassandra.
All of Sean's points are good, a few more: - Apache Cassandra (free, open source, official) is usually sufficient. DSE may be faster, but really it's about whether or not you're willing to pay for support. If you're trying to stop paying Oracle, I suspect you'd probably not want to start paying someone else - try the free version first, and you can look for proprietary options after that. - http://shop.oreilly.com/product/0636920043041.do is relatively recent and mostly pretty good - Ask a lot of questions, use this list, but try things out first so people have a way to point you in the right direction. On Wed, Sep 5, 2018 at 7:58 AM Durity, Sean R wrote: > 3 starting points: > > - DO NOT migrate your tables as they are in Oracle to Cassandra. > In most cases, you need a different model for Cassandra > > - DO take the (free) DataStax Academy courses to learn much more > about Cassandra as you dive in. It is a systematic and bite-size approach > to learning all things Cassandra (and eventually, DataStax Enterprise, > should you go that way). However, open source Cassandra is fine as a data > platform. DSE gives you more options for data models, better administration > and monitoring tools, support, etc. It all depends on what you need/want to > build/can afford > > - Cluster sizing depends on your goals for the data platform. Do > you need lots of storage, lots of throughput, high availability, low > latency, workload separation, etc.? A couple guidelines – use at least 3 > nodes per data center (DC) and at least 2 DCs for availability. Use SSDs > for storage and keep node size 3 TB or less for reasonable administration. > If six nodes are too many – you probably don’t need Cassandra. If you can > define what you need your data platform to deliver, then you can start a > sizing discussion. The good thing is, you can always scale (as long as the > data model is good). > > > > > > Sean Durity > > > > *From:* sha p > *Sent:* Wednesday, September 05, 2018 9:21 AM > *To:* user@cassandra.apache.org > *Subject:* [EXTERNAL] Regarding migrating data from Oracle to > Cassandra.migrate data from Oracle to Cassandra. > > > > > > Hi all , > > Me new to Cassandra , i was asked to migrate data from Oracle to Cassandra. > > Please help me giving your valuable guidance. > > 1) Can it be done using open source Cassandra. > > 2) Where should I start data model from? > > 3) I should use java, what kind of jar/libs/tools I need use ? > > 4) How I decide the size of cluster , please provide some sample > guidelines. > > 5) this should be in production , so what kind of things i should take > care for better support or debugging tomorrow? > > 6) Please provide some good books /links which can help me in this task. > > > > > > Thanks in advance. > > Highly appreciated your every amal help. > > > > Regards, > > Shyam > > > -- > > The information in this Internet Email is confidential and may be legally > privileged. It is intended solely for the addressee. Access to this Email > by anyone else is unauthorized. If you are not the intended recipient, any > disclosure, copying, distribution or any action taken or omitted to be > taken in reliance on it, is prohibited and may be unlawful. When addressed > to our clients any opinions or advice contained in this Email are subject > to the terms and conditions expressed in any applicable governing The Home > Depot terms of business or client engagement letter. The Home Depot > disclaims all responsibility and liability for the accuracy and content of > this attachment and for any damages or losses arising from any > inaccuracies, errors, viruses, e.g., worms, trojan horses, etc., or other > items of a destructive nature, which may be contained in this attachment > and shall not be liable for direct, indirect, consequential or special > damages in connection with this e-mail message or its attachment. >
RE: [EXTERNAL] Regarding migrating data from Oracle to Cassandra.migrate data from Oracle to Cassandra.
3 starting points: - DO NOT migrate your tables as they are in Oracle to Cassandra. In most cases, you need a different model for Cassandra - DO take the (free) DataStax Academy courses to learn much more about Cassandra as you dive in. It is a systematic and bite-size approach to learning all things Cassandra (and eventually, DataStax Enterprise, should you go that way). However, open source Cassandra is fine as a data platform. DSE gives you more options for data models, better administration and monitoring tools, support, etc. It all depends on what you need/want to build/can afford - Cluster sizing depends on your goals for the data platform. Do you need lots of storage, lots of throughput, high availability, low latency, workload separation, etc.? A couple guidelines – use at least 3 nodes per data center (DC) and at least 2 DCs for availability. Use SSDs for storage and keep node size 3 TB or less for reasonable administration. If six nodes are too many – you probably don’t need Cassandra. If you can define what you need your data platform to deliver, then you can start a sizing discussion. The good thing is, you can always scale (as long as the data model is good). Sean Durity From: sha p Sent: Wednesday, September 05, 2018 9:21 AM To: user@cassandra.apache.org Subject: [EXTERNAL] Regarding migrating data from Oracle to Cassandra.migrate data from Oracle to Cassandra. Hi all , Me new to Cassandra , i was asked to migrate data from Oracle to Cassandra. Please help me giving your valuable guidance. 1) Can it be done using open source Cassandra. 2) Where should I start data model from? 3) I should use java, what kind of jar/libs/tools I need use ? 4) How I decide the size of cluster , please provide some sample guidelines. 5) this should be in production , so what kind of things i should take care for better support or debugging tomorrow? 6) Please provide some good books /links which can help me in this task. Thanks in advance. Highly appreciated your every amal help. Regards, Shyam The information in this Internet Email is confidential and may be legally privileged. It is intended solely for the addressee. Access to this Email by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. When addressed to our clients any opinions or advice contained in this Email are subject to the terms and conditions expressed in any applicable governing The Home Depot terms of business or client engagement letter. The Home Depot disclaims all responsibility and liability for the accuracy and content of this attachment and for any damages or losses arising from any inaccuracies, errors, viruses, e.g., worms, trojan horses, etc., or other items of a destructive nature, which may be contained in this attachment and shall not be liable for direct, indirect, consequential or special damages in connection with this e-mail message or its attachment.
Regarding migrating data from Oracle to Cassandra.migrate data from Oracle to Cassandra.
> Hi all , > Me new to Cassandra , i was asked to migrate data from Oracle to Cassandra. > Please help me giving your valuable guidance. > 1) Can it be done using open source Cassandra. > 2) Where should I start data model from? > 3) I should use java, what kind of jar/libs/tools I need use ? > 4) How I decide the size of cluster , please provide some sample > guidelines. > 5) this should be in production , so what kind of things i should take > care for better support or debugging tomorrow? > 6) Please provide some good books /links which can help me in this task. > > > Thanks in advance. > Highly appreciated your every amal help. > > Regards, > Shyam >
