I have a case where I want to store a 32 bytes fingerprint as primary key and just another integer column. At the moment the fingerprint is converted into a hex string and then stored into a cassandra table. I am wondering, however, if it would be better from a partitioning perspective, to use a different key: maybe a blob of twelve bytes? a tuple or a list of bytes? single column?
cassandra - best partition key for a fingerprint
115 Views Asked by Ste At
1
There are 1 best solutions below
Related Questions in CASSANDRA
- Add additional fields to Linq group by
- couldn't copy pdb file to another directory while consuming wcf web service
- Why are the aliases for string and object in lowercase?
- WPF MessageBox Cancel checkbox check
- Resolve object using DI container with object instance
- Creating a parametrized field name for a SELECT clause
- Does compiler optimize operation on const variable and literal const number?
- Get data from one form to another form in C#
- Writing/Overwriting to specific XML file from ASP.NET code behind
- Deleting Orphans with Fluent NHibernate
Related Questions in SCYLLA
- Add additional fields to Linq group by
- couldn't copy pdb file to another directory while consuming wcf web service
- Why are the aliases for string and object in lowercase?
- WPF MessageBox Cancel checkbox check
- Resolve object using DI container with object instance
- Creating a parametrized field name for a SELECT clause
- Does compiler optimize operation on const variable and literal const number?
- Get data from one form to another form in C#
- Writing/Overwriting to specific XML file from ASP.NET code behind
- Deleting Orphans with Fluent NHibernate
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
Popular # Hahtags
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
From partitioning perspective, it doesn't matter if your partition key is a string of hex digits, or blob or several integer columns - in all cases a hash function is used - a Cassandra variant of the Murmur3 hash function - to convert the key's bytes into a 64-bit hash value known as a "token". As all relatively-good hash functions, there is no loss of quality of the hash function if you pass it an highly compressed or non-compressed inputs.
The benefit of using a smaller key (a blob instead of a string of hex digits - the former is half the length of the latter) is that it will use less memory to store these keys in Scylla's caches. It will also use less disk, although if you use Scylla's compression option, some of the size difference will be reduced. So in general, if you can use a blob, it's better to use it and not convert it to hex bytes. That's why the blob column type exists - to be used when it is suitable.