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Index size

Index size is limited by 2GB for 32-bit platforms.

Use 64-bit platforms for larger indices.

Supported Filesystems

Zend_Search_Lucene uses flock() to provide concurrent searching, index updating and optimization.

According to the PHP documentation, "flock() will not work on NFS and many other networked file systems".

Do not use networked file systems with Zend_Search_Lucene.

Zend Framework