OpenStack Swift is a highly scalable, distributed object storage system that is designed to store and retrieve large amounts of unstructured data. It is an open-source project that provides a simple, scalable, and durable storage system for applications and services. Swift is built to be highly available, fault-tolerant, and scalable, making it an ideal choice for storing large amounts of data.
OpenStack Swift is a highly scalable, distributed object storage system
designed to store and retrieve large amounts of unstructured data.
It is an open-source project that provides a simple, scalable, and durable storage system for applications and services.
Swift is built to be highly available, fault-tolerant, and scalable, making it an ideal choice for storing large amounts of data.
Swift is designed to be highly modular, with a simple API that allows developers to easily integrate it into their applications. It provides a RESTful API that can be accessed using a variety of programming languages, making it easy to integrate with existing applications.
Swift is designed to be highly modular, with a simple API that allows developers to easily integrate it into their applications.
It provides a RESTful API that can be accessed using a variety of programming languages,
making it easy to integrate with existing applications.
One of the key features of Swift is its ability to scale horizontally, allowing it to handle large amounts of data and high levels of traffic. It is also designed to be highly durable, with data being replicated across multiple nodes to ensure that it is always available.
One of the key features of Swift is its ability to scale horizontally,
allowing it to handle large amounts of data and high levels of traffic.
It is also designed to be highly durable, with data being replicated across multiple nodes to ensure that it is always available.
Overall, OpenStack Swift is a powerful and flexible object storage system that is well-suited for a wide range of applications and use cases.
Overall, OpenStack Swift is a powerful and flexible object storage system
that is well-suited for a wide range of applications and use cases.
## Accessing Proj4
## Accessing Proj4
The Proj4 object storage is accessible from all IT4Innovations clusters and from outside world also, allows to share data across clusters etc.
The Proj4 object storage is accessible from all IT4Innovations clusters
as well as from the outside.
Additionaly, it allows to share data across clusters, etc.
User has to be part of project, witch is allowed to use S3 storage. After that you will obtain role and credentials for using s3 storage.
User has to be part of project, witch is allowed to use S3 storage.
After that you will obtain role and credentials for using s3 storage.
## How to Configure S3 Client
## How to Configure S3 Client
...
@@ -43,11 +54,12 @@ Configuration saved to '/home/dvo0012/.s3cfg'
...
@@ -43,11 +54,12 @@ Configuration saved to '/home/dvo0012/.s3cfg'
.
.
```
```
now you have to make some bucket for you data with **your_policy** (for example ABC - if ABC is your project)
now you have to make some bucket for you data with **your_policy** (for example ABC - if ABC is your project)
if you will make bucket without policy, we will not able to manage your data expiration of project - so please use policy
if you will make bucket without policy, we will not able to manage your data expiration of project - so please use policy
The S3cmd client uses by default the so-called "multipart upload", which means that it splits the uploaded file into "chunks" with a default size of 15 MB. However, this upload method has major implications for the data capacity of the filesystem/fileset when overwriting existing files. When overwriting an existing file in "multipart" mode, the capacity is duplicated (the file is not overwritten, but rewritten and the original file remains - but the capacity is allocated by both files). This is a described swift bug for which there is no fix yet. But there is a workaround and that is to disable "multipart upload" on the S3CMD client side.
The S3cmd client uses by default the so-called "multipart upload", which means that it splits the uploaded file into "chunks" with a default size of 15 MB. However, this upload method has major implications for the data capacity of the filesystem/fileset when overwriting existing files. When overwriting an existing file in "multipart" mode, the capacity is duplicated (the file is not overwritten, but rewritten and the original file remains - but the capacity is allocated by both files). This is a described swift bug for which there is no fix yet. But there is a workaround and that is to disable "multipart upload" on the S3CMD client side.
```
```console
~ s3cmd --disable-multipart put /install/test1.log s3://test-bucket1
~ s3cmd --disable-multipart put /install/test1.log s3://test-bucket1
upload: '/install/test1.log' ->'s3://test-bucket1/test1.log'[1 of 1]
upload: '/install/test1.log' ->'s3://test-bucket1/test1.log'[1 of 1]
1024000000 of 1024000000 100% in 9s 99.90 MB/s done
1024000000 of 1024000000 100% in 9s 99.90 MB/s done
```
```
this method is not recomended for large files, because it is not so fast and reliable as multipart upload, but it is only way how to overwrite files without duplicating capacity.
this method is not recomended for large files, because it is not so fast and reliable as multipart upload, but it is only way how to overwrite files without duplicating capacity.
